Peanut Butter Cake Mug

This peanut butter cake in a mug is the perfect quick dessert for when you want something sweet and satisfying without a lot of fuss. It comes together in under five minutes and delivers a rich, creamy peanut butter flavor with a moist, tender crumb. Whether you need a last-minute treat or a cozy snack, this cake fits the bill beautifully.

I first tried this cake on a lazy weekend afternoon, craving peanut butter but not wanting to bake a whole cake. It quickly became my go-to comfort dessert whenever I want a sweet pick-me-up.

Ingredients

• Self-rising flour: Four tablespoons for a light, fluffy texture if you don’t have self-rising flour you can make your own by combining all-purpose flour with baking powder and a pinch of salt
• Granulated sugar: Three tablespoons to add just the right amount of sweetness
• Creamy peanut butter: Four tablespoons for that classic rich flavor and creamy mouthfeel choose a natural or well-stirred brand for smoothness
• Whole milk: Three tablespoons to keep the cake tender and moist
• Salted sweet cream butter: Three tablespoons melted for richness and moisture
• Pure vanilla extract: Half a teaspoon to enhance all the other flavors
• Creamy peanut butter (optional): One tablespoon for garnish adding extra peanut butter goodness on top

Instructions

Sift and Mix the Dry Ingredients:

Add the self-rising flour and granulated sugar to a 14-ounce microwave-safe mug. Stir them together until evenly combined. This ensures your cake rises evenly and the sugar is well distributed.

Add the Wet Ingredients:

Measure and add the peanut butter, milk, melted butter, and vanilla extract directly into the mug. Stir everything thoroughly until you have a smooth batter with no lumps. Proper mixing is key to an even bake.

Microwave the Cake:

Place the mug in the microwave and cook for one minute and thirty seconds to one minute and forty-five seconds. Cooking times vary by microwave wattage, so watch for the cake to rise and no longer appear wet on top. Avoid overcooking to keep the cake moist.

Cool and Garnish:

Let the cake cool for a few minutes. Dollop one tablespoon of creamy peanut butter on top. The residual heat will melt the peanut butter, making it easy to spread across the surface for an extra layer of flavor and creaminess.

Peanut butter is my favorite ingredient in this recipe because it brings both flavor and a satisfying texture that makes this cake feel indulgent without being complicated. My kids love when I make this as a surprise late-night treat, especially when I spread the warm peanut butter on top.

Storage Tips

Since this cake is best enjoyed fresh, I recommend eating it within an hour. If you want to keep leftovers, cover the mug tightly with plastic wrap and store it in the refrigerator for up to one day. Reheat gently in the microwave but watch carefully to avoid drying it out.

Ingredient Substitutions

If you are out of self-rising flour, mix one cup of all-purpose flour with one and a half teaspoons of baking powder and a pinch of salt to make your own. Use any type of milk you prefer, including plant-based options, though the texture may vary slightly. For a different flavor, natural peanut butter works great but may need a bit more stirring.

Serving Suggestions

Serve this cake with a scoop of vanilla ice cream or a drizzle of honey for extra indulgence. For a crunch, sprinkle some chopped peanuts or chocolate chips on top right after microwaving.

This quick peanut butter mug cake is a perfect indulgence for any time you need a speedy sweet fix with minimal cleanup.

FAQs about Recipes

→ What type of flour works best for this cake?

Self-rising flour is ideal as it contains leavening agents, providing the right texture without extra ingredients.

→ Can I use natural peanut butter instead of creamy?

Yes, but natural peanut butter might affect the moisture and texture slightly due to its oil separation.

→ How do I know when the cake is done microwaving?

The cake should rise and feel firm to the touch but remain moist inside; microwave times may vary by model.

→ Is it possible to add toppings?

Absolutely, a tablespoon of peanut butter on top melts with the warm cake, enhancing flavor and creaminess.

→ Can I substitute whole milk with another type?

Yes, alternatives like almond or oat milk can be used, though they may slightly alter taste and texture.