Combine muffin mix and nuts in bowl. Lightly beat egg and add eenough milk to make 1/2 cup. Add vanilla and mix well. Add wet ingredientsto dry, and gently stir, leaving lumps in batter. Stir in Apple butter. Pour into sprayed muffin tin, with or without paper liners(your preference), til 1/2-2/3 full. Bake at 450 til golden, about 10-12-15 minutes, depending on your oven. Serve immediately with butter or cream cheese.
NOTE-If using Mini muffin pans, will bake MUCH quicker.