"These apple-cinnamon muffins pack a huge apple flavor with a fabulous cinnamon-sugar crunch on top...."
INGREDIENTS
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For the Muffins: 2 tablespoons unsalted butter 4 tablespoons unsalted butter, melted 2 Granny Smith apples (6 1/2 ounces each), peeled, cored, and cut into 1/4-inch pieces (3 cups) 2 tablespoons light brown sugar 3/4 teaspoon ground cinnamon, divided