Solar Banana Cake

Why is it that those last few bananas never get eaten?  At least at my house, they don’t.  Doesn’t matter if I buy 3 or 6, there are always a few overripe bananas left over. Dark black bananas in the basket hanging in the corner.  Perfect for banana bread.  Today, as I was deciding what to put out in the solar oven, I spied 4 such bananas and thought “Perfect”.

Banana Brownie

Banana Cake


  • 1-1/2 c. sugar
  • 1 c. sour cream
  • 1/2 c. butter, softened
  • 2 eggs

In a large bowl, beat together sugar, sour cream, butter, and eggs until creamy.

  • 1-3/4 (3 or 4) ripe bananas, mashed
  • 2 tsp. vanilla extract

Blend in bananas and vanilla extract.

  • 2 c. all purpose flour
  • 1 tsp. baking soda
  • 3/4 tsp. salt

Add flour, baking soda, salt, and blend until smooth.

  • 1/2 c. chopped walnuts or pecans (optional)

Stir in nuts, if desired

Spread batter into a greased 9×13 pan.  Place into pre-heated solar oven and bake for 2 1/2 – 3 hours until golden brown. (about 30 minutes in a conventional oven at 375°)


  • 1/2 c. butter, melted
  • 4 c. powdered sugar
  • 1-1/2 tsp. vanilla extract
  • 3 tbsp. milk

For frosting, in a medium size bowl, add powdered sugar, vanilla extract,  milk, and melted butter. Whisk together until smooth (it should be thicker than a glaze but thinner than frosting). Using a spatula, spread the frosting over the warm bars (the frosting will be easier to spread while the bars are still warm).

Yield: 2 dozen large bars

Other desserts from the solar oven that you might enjoy:


Chocolate Cake

Strawberry Cake with Strawberry Filling


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