Ingredients for - Oatmeal-Banana Coffee Cake

1. Vegetable oil cooking spray
2. Milk ⅓ cup
3. White vinegar 2 teaspoons
4. Ripe bananas 2
5. All-purpose flour ¾ cup
6. Whole wheat flour ¾ cup
7. Rolled oats ¾ cup
8. Baking powder 1 teaspoon
9. Baking soda ¾ teaspoon
10. Salt ½ teaspoon
11. Unsalted butter, at room temperature ½ cup
12. Brown sugar ½ cup
13. Eggs 2 large
14. Vanilla extract 1 teaspoon
15. Topping: 1 teaspoon
16. Packed brown sugar ⅓ cup
17. All-purpose flour 3 tablespoons
18. Unsalted butter, softened 2 tablespoons
19. Chopped pecans ¼ cup

How to cook deliciously - Oatmeal-Banana Coffee Cake

1 . Stage

Preheat the oven to 375 degrees F (190 degrees C). Spray a 10-inch square baking pan with cooking spray.

2 . Stage

Combine milk and vinegar in a glass to make sour milk; stir gently. Mash bananas in a small bowl to make 1 cup.

3 . Stage

Combine all-purpose flour, whole wheat flour, oats, baking powder, baking soda, and salt in a bowl.

4 . Stage

Cream butter and brown sugar in a large mixing bowl with an electric mixer until fluffy. Beat in eggs and vanilla extract. Mix in bananas. Add dry ingredients in 2 batches, alternating with sour milk; mix thoroughly. Pour batter into the prepared pan.

5 . Stage

Mix brown sugar, flour, and butter for topping together in a bowl. Sprinkle topping over batter, then sprinkle on pecans.

6 . Stage

Bake in the preheated oven until a toothpick inserted into the center comes out clean, 25 to 30 minutes. Cool on a wire rack before cutting into squares.