1 c. coarsely chopped pared apple (about 1 medium size apple)
1 tsp. lemon juice
1 1/2 c. all-purpose flour
1 c. whole wheat flour
1/4 c. granulated sugar
1/4 c. firmly packed brown sugar
4 tsp. baking powder
1/2 tsp. salt
1 c. milk
1 egg
1/4 c. butter, melted
2 tbsp. granulated sugar
1/2 tsp. ground cinnamon

Toss apples with lemon juice in a small bowl; set aside. Stir together flours (1/4 cup each granulated and brown sugars), baking powder, and salt. Whisk milk, egg, and butter; pour over flour mixture. Add apples; gently stir just until dry ingredients are moistened (batter will be heavy). Grease muffin cups or line with paper bake cups; fill 2/3 full. Combine 2 tablespoons granulated sugar and cinnamon; sprinkle over dough. Bake in preheated 400 degree oven for 25 minutes, or until browned and firm. Cool.

Note: To reheat muffins, warm in preheated slow oven (325 degrees) for a few minutes.