u003cstrongu003eWhy is my mug cake rubbery?u003c/strongu003e

Your u003cstrongu003ePeanut Butter Banana Mug Cakeu003c/strongu003e might be rubbery if it’s overcooked. Microwaves vary, so start with 60 seconds and add more only if needed. Using too much flour or mixing the batter excessively can make the texture dense and less tender.

u003cstrongu003eCan you make a mug cake without sugar?u003c/strongu003e

es! The banana in a u003cstrongu003ePeanut Butter Banana Mug Cakeu003c/strongu003e adds natural sweetness. If your banana is perfectly ripe, there's no need for extra sugar—just enjoy it as is or opt for a natural sugar-free sweetener like stevia or monk fruit.

u003cstrongu003eWhat’s the easiest way to make a 3-ingredient mug cake?u003c/strongu003e

Mash ½ banana, add 1 tbsp peanut butter, and 2 tbsp self-rising flour. Mix in a mug and microwave for 60–80 seconds. That’s it — a super simple u003cstrongu003ePeanut Butter Banana Mug Cakeu003c/strongu003e version.

How do you make banana oats mug cake in the microwave?

Swap flour for quick oats or oat flour. The texture will be more hearty but still delicious. Add baking powder to help it rise.

u003cstrongu003eHow to make banana baked oats?u003c/strongu003e

Blend ½ banana, ¼ cup oats, 1 egg, and milk. Bake in the oven at 350°F for 25–30 minutes.

u003cstrongu003eWhy do my mug cakes never work?u003c/strongu003e

Common issues: overcooking, wrong mug size, not using baking powder, or under-mixing. Follow a tested u003cstrongu003ePeanut Butter Banana Mug Cakeu003c/strongu003e recipe and adjust for your microwave power.

Peanut Butter Banana Mug Cake – The Best 5-Minute Microwave Treat

Ingredients

Scale

½ ripe banana (mashed)
1 tbsp peanut butter
2 tbsp flour (all-purpose or oat flour)
¼ tsp baking powder
2–3 tbsp milk (dairy or non-dairy)
Optional: 1 tsp sweetener (honey, maple syrup, or sugar-free)

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Instructions

Mash the banana directly in a 10–12 oz microwave-safe mug.
Add peanut butter and mix well.
Stir in flour, baking powder, and milk until combined.
Mix in sweetener, if using. Do not overmix.
Microwave on high for 60 to 90 seconds. Start with 60 seconds and add time if needed.
Let cool for 1 minute before eating.

Notes

Use very ripe bananas for the best natural sweetness. Avoid overmixing or overcooking to prevent a rubbery texture. Customize with chocolate chips, nuts, or protein powder as desired.

Author: Sabrine Riley
Prep Time: 3 minutes
Cook Time: 1 minute
Category: Dessert
Method: Microwave
Cuisine: American
Diet: Vegan

Nutrition

Serving Size: 1 mug cake
Calories: 270
Sugar: 9g
Sodium: 120mg
Fat: 13g
Saturated Fat: 3g
Unsaturated Fat: 9g
Trans Fat: 0g
Carbohydrates: 32g
Fiber: 3g
Protein: 6g
Cholesterol: 0mg