Soft, moist coffee cake topped with a buttery brown sugar crumble—easy and delicious!

This easy summer classic can be made with fresh or frozen mixed berries, and has the most delicious brown sugar crumble topping. Prep time 10 minutes. Cook time 40 minutes to 45 minutes.

Pastry chef Kierin Baldwin uses three kinds of sugar in her crispy crumble topping, ... 2 tablespoons dark brown sugar. 1/2 tablespoon kosher salt. 1/4 tablespoon ground cinnamon.

Add the brown sugar, granulated sugar, cornstarch mixture, cinnamon and salt. Drizzle the brown butter and vanilla mixture over the apples, making sure to get the brown bits out of the pan.

Crumb Topping. 1/4 cup walnut pieces. 1/2 cup all-purpose flour. 2 tablespoons granulated sugar. 2 tablespoons light brown sugar. 1/4 teaspoon baking powder. Pinch of kosher salt. 2 1/2 ...

3 tablespoons unsalted butter, melted. 1/3 cup old-fashioned oats. 1/4 cup chopped walnuts. Pinch of kosher salt. Whole-milk Greek yogurt, for serving ...