Apple Streusel Muffins

Streusel Topping:
1/3 c. rolled oats
1/4 c. flour
1/4 c. brown sugar
1 tsp. cinnamon
1/4 c. butter

Batter:
1 1/4 c. flour
1 c. rolled oats
1/2 c. brown sugar
2 tsp. baking powder
1/4 tsp. baking soda
1/2 tsp. cinnamon
1/2 tsp. salt
1 c. milk
5 tbsp. butter, melted
1 egg
1 tsp. vanilla
1 med. apple, peeled and chopped

1. Preheat oven to 350 F. Grease 12 muffin cups.
2. Topping: Stir together oats, flour, brown sugar and cinnamon. Cut butter into small pieces, and rub it into oat-flour mixture until texture resembles granola. Set aside.
3. Batter: Stir together flour, oats, brown sugar, baking powder, baking soda, cinnamon and salt in mixing bowl. Whisk together milk, butter, egg, and vanilla in separate bowl. Fold wet ingredients into dry ingredients just until batter comes together. Stir in apple pieces. Spoon batter into muffin cups. Top each with a heaping tbsp. of streusel.
4. Bake 18 to 20 min., or until golden brown and a toothpick inserted in middle of pan comes out clean. Let cool in pan 10 min., and then unmold muffins onto a wire cooling rack.