Eggless Banana Walnut Cakes Recipe Microwave Healthy

Baking cakes from scratch can be intimidating for beginners. Fortunately, this easy eggless banana walnut cake made in the microwave is a perfect recipe to start with. It’s simple to make, healthy, and delicious.


Eggless cakes are great options for people who avoid eggs or want to make vegan baked goods. Bananas act as a natural binder and sweetener to help give the cake moisture and flavor. Walnuts add crunch and nutrition while keeping the cake fat-free. This recipe uses basic pantry ingredients and takes just minutes to prepare in the microwave. No ovens or special equipment needed.

Benefits of Microwave Cakes

Microwaving cakes has many advantages:

  • It’s much faster than baking. This cake cooks in around 5 minutes!
  • You don’t have to wait for the oven to preheat. Just mix, pour, and microwave.
  • It requires less energy than an oven.
  • Microwaves don’t heat up your kitchen.
  • The texture is often moister.
  • It’s convenient for small households.

While microwaved cakes have a slightly different texture, they can be light and tasty.

Ingredient Substitutions

One great aspect of this recipe is flexibility. Many ingredients can be swapped to fit dietary needs or work with what’s on hand:

Bananas – Overripe bananas with spots work best. Substitute applesauce or mashed sweet potato if needed.

Flour – White or whole wheat flour works well. For gluten-free, try oat flour, almond meal, or coconut flour.

Sweetener – Adjust the sugar or use honey, maple syrup, etc. Reduce added sweetener if the bananas are very ripe.

Milk – Dairy milk is traditional but almond milk, oat milk or water could also work.

Walnuts – Swap for pecans, almonds or omit nuts entirely.

Spices – Customize with flavors like cinnamon, vanilla, nutmeg, etc.

Now let’s go over the easy method.

Eggless banana walnut cake recipe microwave healthy


Step-By-Step Microwave Cake Instructions

Baking this single-serve cakes takes less than 10 minutes prep time. Here’s how:

Gather Ingredients

You’ll need:

  • 1 medium banana
  • 1⁄4 cup + 1 Tbsp flour
  • 2 Tbsp sugar
  • pinch of salt
  • 1 Tbsp vegetable oil
  • 1 Tbsp milk
  • 1⁄4 tsp baking powder
  • 2 Tbsp chopped walnuts
  • cinnamon (optional)

Make sure your banana is speckled and soft.

Mash the Banana

In a microwave-safe mug or ramekin, thoroughly mash the banana with a fork. Break it down into a thick puree.

Mix Dry Ingredients

In a small bowl, whisk together the flour, sugar, salt, baking powder and cinnamon if desired.

Add Wet Ingredients and Walnuts

Stir the oil, milk, and walnuts into the mashed banana. Then add the dry ingredient mixture and continue mixing just until combined. A few small lumps are ok.


Carefully transfer the batter to a microwave-safe mug coated in cooking spray. Microwave on high for 2 minutes. Allow to cool slightly before enjoying.

The cake will rise then fall a bit. Top it off with whipped cream or ice cream if you’d like.

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Microwaved mug cakes are easy, but issues can pop up. Here are some common problems and solutions:

Dense texture – Try slightly reducing the flour or adding an extra Tbsp of milk for a more tender crumb.

Too dry – Microwave in 30 second intervals next time, checking often. And make sure overripe bananas are used.

Batter overflowed – Use a wider, somewhat shallow dish to give batter room to rise without spilling over.

Uneven cooking – Microwave ovens have hot and cold spots. Turn the dish periodically for even heating.

Adding mix-ins – Delicate ingredients like chocolate chips may scorch. Stir them in after microwaving instead.

With a little trial and error, you’ll learn how long your microwave takes. Soon this will become your go-to easy cake recipe.

Recipe Variations

Once you master the basic recipe, get creative with these tasty flavor ideas:

Chocolate Banana Cake – Stir in chocolate chips after microwaving or drizzle with chocolate sauce.

Pumpkin Spice Cake – Substitute pumpkin for the banana. Add pumpkin pie spice and walnuts.

Carrot Cake – Replace banana with finely shredded carrots. Add cinnamon, raisins or nuts.

Lemon Blueberry Cake – Use lemon yogurt instead of milk. Fold in fresh blueberries after microwaving.

Funfetti Cake – Sprinkle colorful sprinkles or confetti candy into the batter. Ice with vanilla buttercream.

Let your imagination run wild! The microwave makes whipping up personalized cakes quick and simple.



Here are answers to some frequently asked questions:

Can I make this in a oven instead?

Yes, you can bake it in the oven. Just transfer the batter to a greased cake pan. Bake at 350°F for 18-22 minutes until a toothpick comes out clean.

What if I don’t have baking powder?

You can substitute 1/4 teaspoon baking soda + 1/2 teaspoon cream of tartar. Or simply omit it; the texture may just be a little denser.

Can I use almond flour?

Yes, almond flour substitutes nicely for regular flour. You can also try a gluten-free flour blend that contains starch for best texture.

How long does the cake stay fresh?

Stored in an airtight container, the cake stays moist for 3-4 days at room temperature. It freezes well for up to 3 months.

Can I use a metal bowl instead of ceramic?

We don’t recommend using metal bowls or mugs. The batter can heat unevenly and get too hot in metal containers. Heat-safe glass or ceramic mugs work best.

Got a question not answered here? Feel free to reach out for any help with your microwave banana walnut cake.


This simple eggless banana walnut mug cake is perfect for beginner bakers and anyone craving homemade cakes fast. Thanks to the speedy microwave method, you can enjoy warm, moist cake in under 10 minutes start to finish.

With pantry-staple ingredients like ripe bananas, flour, sugar and vegetable oil, it comes together in just one bowl. Simply mash, mix, and microwave for an easy sweet treat anytime.

Finally, customize the cake with spices, frosting, or mix-ins to create your own unique flavors. From chocolate lover’s cakes to carrot cake and everything in between, the options are endless.

For an effortless, healthy dessert that really satisfies without turning on the oven, give this easy eggless banana walnut mug cake a try. In just minutes, enjoy cakes from scratch.

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