The Ultimate Coffee Cake in a Mug: Quick, Easy, and Delicious Single-Serving Treat

There are some cravings that simply can’t wait, and a warm, buttery slice of coffee cake with its sweet crumb topping and a delicate glaze is definitely one of them. But who has the time (or the willpower!) to bake an entire cake just for a quick fix? Most of us want that immediate satisfaction without the fuss, the leftovers, or the lengthy baking process. That’s precisely where our Coffee Cake in a Mug recipe comes to the rescue!

Imagine this: a delightful, perfectly portioned coffee cake, fresh from the microwave, ready to be devoured in under 10 minutes. It’s not just a mug cake; it’s a revelation. This recipe is designed for those moments when you crave something sweet, comforting, and utterly delicious, but only want one serving. No commitments to a whole cake, just pure, unadulterated individual indulgence. Trust us, it’s so good, you’ll wonder why you ever baked a full-sized coffee cake again!

Mug Cake Mania: Why This Coffee Cake is a Must-Try

Welcome to Mug Cake Week, where we celebrate the magic of single-serving desserts made right in your favorite mug! We’ve saved what we truly believe is the best for last – this incredible Coffee Cake in a Mug. While it might involve a *little* bit more effort than some of our other super-speedy mug cake creations, we promise you, every extra minute is absolutely worth it. The result is a tender, moist cake with a delightful streusel topping and a sweet drizzle that perfectly mimics its full-sized counterpart.

The beauty of this recipe lies in its ability to deliver the quintessential coffee cake experience without the traditional baking time. You get that irresistible combination of soft cake, crunchy, cinnamon-spiced crumb topping, and a delicate glaze, all still warm from the microwave. What’s more, you can enjoy it any time your craving strikes – morning, noon, or night. With most of the work done in less than 10 minutes (and often around 5 minutes if you’re focused!), instant gratification has never tasted so good. It’s the ultimate solution for a quick breakfast treat, an afternoon pick-me-up, or a late-night dessert without the commitment of a whole batch.

This is a true personal indulgence, designed for one large coffee mug, entirely for yourself. It’s the perfect portion control for when you just want a taste of something sweet without overdoing it. Or, if you’re feeling exceptionally generous and want to share the joy, you could divide the batter and crumb topping into two smaller mugs. This makes it an ideal treat to share with a friend, a loved one, or simply to save one for later. But let’s be honest, we won’t judge if you decide to keep both delicious portions all to yourself. Some things are just too good to share!

The Anatomy of a Perfect Coffee Cake Mug Cake

Achieving that signature coffee cake flavor and texture in a mug requires a thoughtful combination of ingredients. Let’s explore what makes this recipe so special and how each component contributes to your ultimate single-serving dessert experience. Each ingredient plays a crucial role in creating the moist, tender cake and the perfectly spiced, crumbly streusel that coffee cake lovers adore.

Coffee Cake in a Mug Recipe

Ingredients for Your Mug Cake

For the Cake Batter:

• 2 tablespoons butter, softened: Essential for a rich, tender crumb. Make sure it’s truly softened, not melted, for proper creaming and a moist cake.
• 4 tablespoons granulated sugar: Provides sweetness and helps create a delicate, fluffy texture.
• 1 egg: Acts as a binder, adding moisture, richness, and structure to the cake. Using a whole egg for this generous serving ensures good texture.
• 4 tablespoons sour cream: This is a secret weapon for incredibly moist and tender cakes! It adds a slight tang that complements the sweetness and prevents the cake from drying out in the microwave.
• 1/4 teaspoon vanilla extract: For that classic warm, aromatic flavor that elevates any baked good. Don’t skip this essential ingredient!
• 1/2 cup all-purpose flour: The structural base of our cake. Use regular all-purpose flour for best results.
• 1/4 teaspoon baking powder: Our leavening agent, which helps the cake rise and achieve a light, airy crumb in the microwave.

For the Crumb Topping:

• 2 tablespoons cold butter, diced: Cold butter is key to achieving that perfectly crumbly, distinct streusel texture. It melts slowly, creating pockets of flavor.
• 4 tablespoons all-purpose flour: Forms the bulk of the delicious crumbs, giving them body and structure.
• 2 tablespoons brown sugar, packed: Adds a deeper, molasses-rich sweetness and helps create a lovely golden-brown, slightly chewy topping.
• 2 teaspoons ground cinnamon: The quintessential coffee cake spice! It provides that warm, inviting aroma and flavor. Feel free to adjust to your liking for a stronger or milder cinnamon presence.
• 2 teaspoons chopped pecans (optional): Adds a wonderful nutty flavor and satisfying crunch that contrasts beautifully with the soft cake. Walnuts or other nuts would also work well, or you can simply omit them for a nut-free version.

For the Glaze:

• 1/4 cup powdered sugar: The base for our simple, sweet, and smooth glaze. Sift it for an extra smooth result, if desired.
• 2-3 teaspoons milk (any kind): Start with 2 teaspoons and add more gradually, a few drops at a time, until you reach your desired drizzling consistency – not too thick, not too thin.

Step-by-Step Instructions for Your Microwave Coffee Cake

1. Prepare Your Workspace: You have a choice: either mix the cake batter directly in your large microwave-safe mug (saving on dishes and time!) or use a separate small bowl for mixing and then transfer it. If mixing in the mug, ensure it’s large enough (at least 12-14 oz) to prevent overflow during cooking, as the cake will rise.
2. Cream Butter and Sugar: In your chosen mixing vessel, place the softened butter. Add the granulated sugar. Using a fork or small whisk, thoroughly mix these two ingredients together until the mixture is light, creamy, and smooth. This creaming step is crucial for incorporating air, contributing to a lighter, more tender cake texture.
3. Add Egg: Crack in your egg and beat it into the butter-sugar mixture until fully combined and smooth. Ensure there are no streaks of egg white remaining.
4. Introduce Wet Ingredients: Now, stir in the sour cream and vanilla extract. Mix well until everything is uniformly incorporated. The sour cream is your secret weapon here, making the cake incredibly moist and delightful!
5. Combine Dry Ingredients: Add the flour and baking powder to the wet mixture. Gently blend until just combined. Be careful not to overmix, as this can develop gluten and lead to a tough, rubbery cake. A few small lumps are perfectly fine and will disappear during cooking.
6. Prepare Crumb Topping: In a separate small bowl, combine all your crumb topping ingredients: the cold, diced butter, flour, packed brown sugar, ground cinnamon, and chopped pecans (if you’re using them).
7. Create Crumbs: Using a fork, your fingertips, or a pastry blender, work the cold butter into the dry ingredients until a coarse, crumbly mixture forms. The key is to keep the butter cold, as this helps achieve distinct, delicious crumbs rather than a paste.
8. Assemble the Mug Cake: If you mixed the batter directly in the mug, simply spoon or sprinkle the prepared crumb topping evenly over the top of the batter. For an even more authentic coffee cake experience with pockets of streusel throughout, try layering!
9. Layering for Perfection (Optional but Recommended): For a truly decadent experience, spoon about half of the cake batter into the bottom of your mug. Sprinkle about half of the crumb topping over this first layer of batter. Then, carefully spoon the remaining batter on top, followed by the rest of the crumb topping. This layering ensures streusel in every bite!
10. Microwave & Cook: Place your mug(s) in the microwave. Cook on high power for 1 minute.
    • For two smaller mugs: After 1 minute, they are likely done. Check for doneness by gently pressing the top – it should spring back.
    • For one large mug: You will probably need an additional 20-30 seconds. Continue microwaving in 15-second intervals until the cake is set but still moist. Remember, microwave wattages vary, so watch closely! Overcooking can make it dry, so err on the side of slightly undercooked rather than overcooked.
11. Prepare the Glaze & Serve: While your cake is cooling slightly (just for a minute or two), combine the powdered sugar and milk in a small bowl. Stir vigorously until the mixture is creamy and smooth, with no lumps. If it’s too thick, add a tiny bit more milk; if too thin, add a pinch more powdered sugar. Drizzle this delightful glaze generously over your warm coffee cake in a mug. Get your fork out and enjoy immediately for the best taste and texture!

Did you make this recipe?

We’d absolutely love to see your creations! Please leave a comment on the blog below, or share a photo of your delicious Coffee Cake in a Mug on Instagram. Don’t forget to tag us or use a relevant hashtag so we can admire your baking prowess!

This delightful Coffee Cake in a Mug recipe was originally adapted from Prudent Baby, a fantastic source for creative and practical ideas.

Tips for Your Best Coffee Cake Mug Cake Every Time

• Don’t Overmix: When adding the flour and baking powder, mix just until combined. Overmixing develops gluten, which can make your cake tough and rubbery. A light hand is key!
• Microwave Wattage Varies: Microwave cooking times can differ significantly based on your oven’s wattage and the size of your mug. Start with the lower end of the cooking time and add in short bursts (10-15 seconds) until done. The cake should look set but still be moist. A toothpick inserted might come out with a few moist crumbs, but not raw batter. It’s better to slightly undercook than overcook.
• Cooling Time Matters: While it’s incredibly tempting to dig in immediately, letting the mug cake cool for just a minute or two helps it set and improves its texture, allowing the flavors to meld beautifully.
• Adjusting Sweetness and Spice: Feel free to increase or decrease the cinnamon in the crumb topping to match your preference. A tiny pinch of nutmeg or cardamom can also be a lovely addition for an extra layer of warm spice.
• Nut Variations: If pecans aren’t your favorite or you don’t have them on hand, chopped walnuts, slivered almonds, or even a mix of seeds (like sunflower or pumpkin seeds) can be used in the streusel for added crunch. For a nut-free version, simply omit them or replace with a tiny bit more flour in the streusel.
• Mug Size: Use a standard coffee mug (about 12-14 ounces) for one generous serving. If your mug is smaller, you might need to adjust quantities or expect a slightly smaller cake.

Make-Ahead & Gifting Ideas: Beyond Immediate Gratification

This coffee cake in a mug isn’t just for immediate indulgence; it can also be a fantastic make-ahead option, perfect for busy mornings or unexpected guests! I can easily envision myself whipping up a few of these the night before for the kids. After they’ve cooled completely, simply cover them tightly with plastic wrap and pop them in the fridge. In the morning, they can pull them out, microwave for a few seconds (about 15-30 seconds) to warm them up, drizzle with the pre-made glaze (which you can store in a tiny sealed container in the fridge), and enjoy a warm, homemade breakfast treat before school. Oh yes, that’s definitely earning some super cool mom (or dad!) points, and a healthy dose of morning cheer!

For a thoughtful and charming gift, assemble the dry ingredients for the cake batter and the crumb topping in pretty layered jars. Include a recipe card with instructions for adding the wet ingredients (butter, egg, sour cream, vanilla, milk for glaze) and microwave cooking times. It’s a delightful and personalized present for friends, teachers, neighbors, or anyone who appreciates a quick, easy, and delicious homemade treat. Perfect for birthdays, holidays, or just because!

Explore More Mug Cake & Sweet Treat Delights!

Loved this Coffee Cake in a Mug? If you’re now a fan of the quick, easy, and utterly delicious mug cake phenomenon, you’re in luck! We have a whole collection of other fantastic mug cake recipes that are just as simple and satisfying. Why stop at one when you can explore a world of single-serving desserts that are ready in a flash?

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