Instructions: For streusel topping, combine brown sugar and flour. Add butter in chunks, and cut in until coarse crumbs are formed. Set aside. Heat oven to 375*. Grease 12 standard 2 1/2" diameter muffin cups. In a large bowl, combine flour, sugar, baking powder, soda, spices and walnuts. In another bowl, combine eggs, melted butter and sour cream with a whisk until well blended. Add chopped apples and sour cream mixture to dry ingredients and stir just until evenly moistened, no more than 15-20 strokes. Spoon batter into each muffin cup until no more than 2/3 full. Bake in center of preheated oven until browned tops feel dry and springy, and a cake tester inserted into center of muffin comes out clean, 20-25 min. Do not over bake. Let muffins rest in pan 5 min. before turning out on to rack to cool.

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