Peanut Butter Mug Cake Vegan

This healthy mug cake is a simple recipe cooked in 90 seconds in the microwave and made with simple, wholesome, and nutrient-loaded ingredients. It uses oat flour as the base of the batter for a gluten-free mug cake. I love making simple mug recipes like this, and I’ve shared many, such as my Protein Mug Cake, Vegan Gluten-Free Mug Cake, or Oatmeal Mug Cake.

Why You’ll Love This Mug Cake

This healthy mug cake is absolutely delicious, and it is:

Gluten-Free Dairy-Free Egg-Free Ready In 5 Minutes Only 6 Wholesome Ingredients

Ingredients and Substitutions

All you need to make this single-serve peanut butter cake are 8 ingredients.

Peanut Butter – The best is natural peanut butter with no added sugar or oil. You can also use almond butter to boost your plant-based protein intake and reduce saturated fat. But overall, any nut butter you love works in the recipe as long as the jar is fresh. For a nut-free option, sunflower seed butter or tahini is great. Pure Peanut Butter is always vegan so pick one with only peanuts! Baking Powder or half the amount of baking soda if preferred. However, baking soda won’t rise the cake as much and can leave a bitter aftertaste. Oat Flour – Make your own oat flour following my tutorial. It is the best healthy option to make this vegan mug cake recipe. However, spelt flour or all-purpose flour work too, but the cake will be dryer. Maple Syrup or any liquid sweetener you like, agave syrup, or rice syrup. Unsweetened Almond Milk – or any non-dairy plant-based milk you like, oat milk and soy milk also work. Vanilla Extract or vanilla essence. Vegan Dark Chocolate Chips – This is optional, but the cake batter is pretty bland with the chips, and I highly recommend this addition.

How To Make Vegan Peanut Butter Mug Cake

I recommend preparing the batter directly in the mug using a small whisk to combine the ingredients together and avoid lumps. First, combine maple syrup, peanut butter, and vanilla. Then, add the almond milk at room temperature, not cold, or it will form flour lumps. Finally, whisk in the oat flour until it creates a smooth light brown cake batter. Feel free to add the vegan chocolate chips at this time. The last step consists of placing the mug in the center of your microwave and bake at 800W for 70-90 seconds, or 10 seconds after the cake rises.

Watch This To See How I Make It

Expert Tips

If you are new to microwave mug recipes, let me guide you through simple tips to success.

Mug Size: It is one of the most important parts of baking in a mug, choosing the right mug. In fact, you must use at least an 8-ounce (250 ml) coffee mug to ensure the best cake texture. If your mug is too small, the batter will overflow, and you will end up with half the batter out of the mug.

Microwave Power: Not all microwave ovens work at the same power. Like regular ovens, they have different levels of energy. In order to make the best cake in a mug, you must set your microwave to 800W power, which is a very standard power. If you are not sure about your microwave power, always start baking the cake for only 70 seconds, stop and check the texture and return to the microwave in 10-second bursts to get your favorite cake texture. As a general rule, when the cake rises, stop the microwave in the following 10 seconds, and the texture should be the best!

Enjoy Immediately: Cake baked in the microwave must be served immediately. In fact, microwave dry cake batter very quickly and consequently they won’t store very well. Baking Time: A cake baked in the microwave is cooked 10 seconds after it rises. It means that you will stop the microwave within 10 seconds after seeing the cake reaching its maximum height. Then, the cake will slightly deflate and keep cooking as the mug is very hot. That’s why it is better to start with a 70-second baking time on high power (800W). If you really like your cake denser or firmer, simply return to the microwave and bake by an extra 10-second burst until it reaches your favorite texture.

Serving Suggestions

It is better to serve this peanut butter cake immediately. Wait 1 or 2 minutes before digging in, or you may burn yourself. Also, if you have a strong sweet tooth, you can top your cake with delicious toppings like:

A scoop of vegan ice cream Extra vegan dark chocolate chips Whipped coconut cream or Vegan Whipped Cream A drizzle of jam – for the PB&J combo lovers!