Often reserved for breakfast, crumb is just as satisfying when served for dessert. Replace the blueberries with other berries or sliced apples or plums, if desired.

　　

Ingredients

Serves 9

　　4 tablespoons unsalted butter, at room temperature, plus more for pan

　　1 1/2 cups all-purpose flour, plus more for pan and 1 teaspoon for blueberries

　　1 1/2 teaspoons baking powder

　　1/2 teaspoon baking soda

　　1/4 teaspoon salt

　　1/4 teaspoon ground allspice

　　3/4 cup sugar

　　1 large egg

　　1/4 cup buttermilk

　　1 1/2 cups blueberries, picked over, rinsed, and patted dry

　　Streusel Topping (recipe follows)

　　

Streusel Topping

1 cup all-purpose flour

　　1/2 cup packed light brown sugar

　　1/4 teaspoon salt

　　1/2 cup (1 stick) cold unsalted butter, cut into tablespoons

　　

Step 1

Preheat the oven to 350°F. Butter a 9-inch square baking pan; dust with flour, tapping out excess.

　　

Step 2

In a medium bowl, whisk together the 1 1/2 cups flour, the baking powder, baking soda, salt, and allspice. In another bowl, cream the butter and sugar with an electric mixer until light and fluffy. Add the egg; beat until combined.

　　

Step 3

Add the flour mixture and buttermilk in alternating batches, beginning and ending with the flour; beat until just combined (the batter will be very stiff).

　　

Step 4

In a small bowl, toss the blueberries with the remaining teaspoon flour. Fold the berries into the batter; pour into the prepared pan. Sprinkle evenly with the streusel topping, covering the batter completely (do not press in). Bake until golden brown and a toothpick inserted in the center comes out clean, 45 to 50 minutes. Let cool completely.

　　

Streusel Topping

Step 5

In a medium bowl, mix the flour, sugar, and salt. Using your fingers, work in the butter until large, moist crumbs form. (Make sure the crumbs are large so they form a crisp topping as the cake bakes instead of melting into the batter.) Chill streusel until ready to use.

　　Reprinted with permission from Everyday Food: Great Food Fast by Martha Stewart Living Magazine. Copyright © 2007 by Martha Stewart Living Magazine. Published by Crown Publishing Group. All Rights Reserved.Martha Stewart Living magazine was first published in 1990. Over the years, more than two dozen books have been published by the magazine's editors.Martha Stewart is the author of dozens of best-selling books on cooking, entertaining, gardening, weddings, and decorating. She is the host of The Martha Stewart Show, the successful daily syndicated television show.