Oat 'n' Apple Chewies for horses 1 1/2 cups unsweetened applesauce 1 cup oat bran cereal or ground oatmeal 1/2 cup all purpose flour (approx.) Preheat oven to 350°F Oil a 9inch x 9inch square cake pan. Spread the batter evenly in the cake pan. Bake for 20-30 minutes. The batter will start to shrink away from the sides and it will be firm to the touch. Slice into squares while still warm. Keep chewies in the refrigerator in an air-tight container or bag.