Chocolate Ribbon Banana Loaf - cooking recipe

Ingredients

1/4 cup butter, softened
1 cup sugar
2 eggs
1 cup mashed ripe banana (about 2 medium)
1/3 cup plain fat-free yogurt
1 teaspoon vanilla extract
1 1/2 cups all-purpose flour
1/2 cup whole wheat pastry flour
3/4 teaspoon baking soda
1/2 teaspoon salt
1/2 teaspoon ground cinnamon
1/2 cup peanut butter chips
1/2 cup semi-sweet chocolate chips, melted

Preparation

In a large bowl, beat butter and sugar until crumbly, about 2 minutes. Add eggs, one at a time, beating well after each addition. Beat in the bananas, yogurt, and vanilla. Combine the flours, baking soda, salt, and cinnamon; gradually beat into the butter mixture. Stir in peanut butter chips.
Remove 1 cup batter to a small bowl; stir in chocolate until well blended. Pour half of remaining batter into a 9x5 inch loaf pan coated with cooking spray; top with half of the chocolate batter. Repeat layers. Cut through batter with a knife to swirl.
Bake at 350 degrees for 40-50 minutes or until a toothpick inserted near the center comes out clean. Cool for 10 minutes before removing from pan to a wire rack.