To prepare a stuffed monkeys cinnamon sugar pinwheels baked goods recipe, you will first need to gather your ingredients. You will need: 1 pound of rolled oats, 1 cup of brown sugar, 2 cups of flour, and 1 teaspoon of baking powder. Preheat the oven to 350 degrees F (180 degrees C). Grease and flour two 8-inch square baking pans and set aside. Using an electric mixer, beat the butter and sugar on medium speed until light and fluffy, about 2 minutes. Add the eggs and vanilla and beat until incorporated. Gradually add the flour mixture, beating just until combined. Pour the batter into the greased pan and bake for 20 to 25 minutes or until toothpick inserted in the center comes out clean. Allow the cake to cool before removing it from the pan.