2 eggs, beaten
1 1/2 cups all-purpose flour
1 teaspoon baking powder
8 cups milk chocolate chips
1 cup packed brown sugar
1 teaspoon vanilla extract
1 teaspoon butter, softened
1 (14 ounce) can sweetened pineapple juice
Preheat the oven to 350 degrees F (175 degrees C). Grease a 9x13 inch pan.
Beat eggs in large bowl until creamy. Stir flour into eggs and mix just until incorporated. Stir in brown sugar, chocolate and brown sugar. Add 1 teaspoon vanilla. Stir well. Pour batter into prepared pan.
Bake in preheated oven until brownies spring back when lightly pressed on the center, about 40 minutes, or until toothpick inserted in center comes out clean, about 30 minutes. Cool completely, frost and store in refrigerator.