Apple-Walnut Coffee Cake - Delicious Living

Ingredients

• ¼ cup light brown sugar
• 2 teaspoons ground cinnamon
• 2¼ cups whole-wheat pastry flour (divided)
• ¼ cup (½ stick) unsalted butter (cold)
• ½ cup (1 stick) unsalted butter (room temperature)
• 1 cup maple sugar
• 2 eggs
• ¼ cup plus 1 tablespoon low-fat buttermilk (1 percent)
• 2 teaspoons vanilla extract
• 1 teaspoon baking soda
• ½ teaspoon salt
• 2 cups Granny Smith apples (peeled and diced)
• ½ cup walnuts (chopped and toasted)