Preheat oven to 350°.

Grease and flour a 9x13" pan.

Place 1 1/2 tablespoons of lemon juice in a 2 cup measuring cup. Fill to 1 1/2 cups with milk. Set aside.

Mix together mashed banana with 1 tablespoon lemon juice and set aside.

In a large bowl, beat together butter, brown sugar, granulated sugar until combined.

Add in eggs one at a time.

Add in vanilla.

Mix on high until light and fluffy (almost the texture of frosting).

In a medium bowl combine the flour, baking soda, and salt.

Alternate adding the flour mixture and the milk to the egg mixture stirring just until combines, don't over mix.

Fold in bananas.

Pour into prepared pan.

Put in oven. Reduce heat to 300°. Bake 60-70 minutes, until toothpick inserted in center comes out clean.

Remove from oven and place directly into freezer for 45 minutes to make the cake extra moist.

Cool completely before frosting.