Created by Mikekey on September 21, 2014
Step 1: Place cupcake liners inside a 12-cup standard muffin tin.
Step 2: Preheat oven to 400 degrees.
Step 3: Whisk together sugar, flour, baking soda, salt, cinnamon, and nutmeg in a medium bowl. Add diced apples and walnuts, tossing to coat.
Step 4: Whisk together eggs, yogurt, butter, and Calvados (if using) in a small bowl. Gently fold the liquid mixture into the flour mixture until just combined. Don’t over mix.
Step 5: Divide batter among muffin cups.
Step 6: In a small bowl, mix brown sugar with cinnamon. Sprinkle a little of the mixture over the top of each muffin.
Step 7: Bake 15-20 minutes or until muffins are brown around edges and wooden pick inserted in center of a muffin comes out clean. Remove muffin pan to a rack to cool for about 5 minutes. Then, turn out muffins onto the wire rack.
Step 8: Store muffins in an airtight container at room temperature for up to 2 days. Or freeze in a plastic container