1 1/2 Flour
2 Baking Powder
1 Baking Soda
1/3 Brown Sugar
Prepare Streusel Topping by mix topping ingredients in small bowl until crumbly.
In large bowl, mix flour, sugar, baking powder, cinnamon, soda and cloves.
Add apple and walnuts; toss to coat.
In small bowl, beat eggs with fork; beat in buttermilk and butter.
Add to flour mixture; stir just until blended.
Fill greased pans 2/3 full.
Sprinkle with Streusel Topping.
Bake in preheated 400 degrees oven until pick inserted in center comes out clean, 15 to 25 minutes for muffins, 30 to 35 minutes for 9-inch square coffee cake.