1/2cupmargarine or cold unsalted butterchilled and diced
1 1/2teaspoonsbaking powder
1/2teaspoonbaking soda
1 1/2teaspoonscinnamon
1/2teaspoonsalt
1eggbeaten
2/3cupbuttermilk or regular milk
1teaspoonvanilla extract
2applescored, peeled, and finely chopped
Instructions
Preheat oven to 400°F. Grease 16 muffin cups or line with paper liners.
Combine 1 1/3 cups flour, brown sugar, and cold margarine in a large bowl. Cut together with a pastry blender until coarse crumbs form.
Reserve 1/4 cup of the crumb mixture for topping.
Add remaining 2/3 cup flour, baking powder, baking soda, cinnamon, and salt to the bowl. Stir to combine.
In a separate bowl, combine beaten egg, buttermilk, and vanilla.
Add wet ingredients to dry ingredients and stir just until combined.
Fold in chopped apples.
Divide batter among prepared muffin cups and sprinkle reserved crumb mixture over the tops.
Bake 20 to 24 minutes, until a toothpick comes out clean. Cool before serving.
Notes
Do not overmix; stir only until combined for tender muffins. To make a buttermilk substitute, stir 2 teaspoons white vinegar into 2/3 cup milk and let sit 5 minutes. Firm apples like Granny Smith or Honeycrisp hold up best. Store at room temperature up to 3 days or freeze up to 3 months.