Starbuck's Streusel Crumb Coffee Cake recipe - from the Good and Simple Eats Family Cookbook

Ingredients

• The Streusel:
• 1 1/2 cups graham cracker crumbs
• 3/4 cup finely chopped walnuts
• 3/4 cup brown sugar, firmly packed
• 1 teaspoon ground cinnamon
• 1/4 teaspoon ground cardamom
• 1/2 cup unsalted butter, melted
• The Cake:
• 2 cups cake flour
• 1 cup granulated sugar
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon salt
• 1/2 cup unsalted butter, at room temperature
• 2 eggs
• 1 1/2 teaspoons vanilla extract
• 1 cup milk