Karen's Peanut Butter Chocolate Chip Cake

2 1/2 cups all-purpose flour
1 1/2 cups dark brown sugar
3 teaspoons baking powder
1 teaspoon salt
1 1/2 cups milk
1 cup creamy peanut butter
2 large eggs
2 tablespoons unsalted butter, softened
2 tablespoons vegetable oil
2 teaspoons vanilla
1 1/2 cups semi-sweet chocolate chips

Preheat the oven to 375 F. Coat two 9-inch baking pans with cooking spray and flour.

Combine dry ingredients (except chocolate chips) in the bowl of a mixer and blend thoroughly. Combine wet ingredients (except for peanut butter) in a measuring cup and whisk together with a fork. Add wet ingredients and peanut butter to the bowl of the mixer and blend until smooth. Fold in chocolate chips then transfer to cake pans, dividing evenly. Bake at 375 F 25-30 minutes or until a cake tester inserted in the center comes out clean. Cool in the pan ten minutes then remove to a wire rack until completely cool.