Adapted from
Makes 12 Muffins

2 cups all-purpose flour
1 teaspoon baking powder
1/2 teaspoon baking soda
1/2 teaspoon salt
1 teaspoon cinnamon
1/2 teaspoon nutmeg
1/4 cup butter, softened
1/4 cup olive oil or applesauce
1/2 cup white sugar
1/2 brown sugar
2 eggs
1 teaspoon vanilla
1 1/2 cups chopped apples, small pieces
Streusel Topping:
1/3 cup packed brown sugar
1 tablespoon all-purpose flour
1/2 teaspoon ground cinnamon
1 tablespoon butter

Preheat oven to 375 degrees F (190 degrees C). Grease or add paper liners to a 12-cup muffin pan.

Peel and chop the apples and set aside.

In a medium bowl mix flour, baking powder, baking soda, salt, cinnamon and nutmeg.

In a large bowl beat together butter, oil, white sugar, brown sugar and eggs until smooth. Mix in vanilla. Stir in apples, and gradually blend in the flour mixture until completely combined. The batter will be really thick almost like dough but don't worry because the apples will release their juices when baking. 

Spoon the mixture into the prepared muffin pan.

In a small bowl mix brown sugar, flour and cinnamon thoroughly and cut in butter until mixture is like coarse crumbs. Sprinkle over tops of mixture in muffin pan.

Bake 20 minutes in the preheated oven, or until a toothpick inserted in the center of a muffin comes out clean. Allow to sit 5 minutes before removing muffins from pan. Cool on a wire rack.