- 2 Tbsp lemon juice
- 2/3 cup milk
- 2 large very ripe bananas, mashed
- 1 package butter cake mix
- 1 tsp baking soda
- 1/2 cup butter, softened
- 3 eggs
- 1 tsp vanilla
- 8 Tbsp butter
- 1 cup peanut butter
- 2 cups powdered sugar-sifted
- 3 Tbsp milk
- 2 tsp vanilla
Preheat oven to 350. Grease and flour 9x13 pan.
Put 1 Tbsp lemon juice in a measuring cup with 2/3 cup milk. Set aside.
Mash bananas with a fork, adding the remaining 1 Tbsp lemon juice to them as you mash. Set aside.
In a large bowl, combine cake mix and baking soda. Stir to combine. Add bananas, softened butter, milk mixture, eggs and vanilla. Beat at low speed until moistened (about 30 seconds). Beat at medium speed for 4 minutes. Pour into prepared pan. Bake in preheated oven for 30-35 minutes or until center of cake springs back when lightly tapped. Allow to cool on wire rack.
Place peanut butter and butter in large mixing bowl. Blend with an electric mixer on low speed until fluffy. Add powdered sugar, milk and vanilla. Blend with mixer on low speed until sugar is well combined. Increase speed to medium and beat until frosting lightens and is fluffy.
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