Welcome Home Rhubarb Crumb Cake

from Martha Stewart Everyday Food

Ingredients-Streusel
6 tablespoons unsalted butter, melted, plus room-temperature butter for pan
1 cup all-purpose flour (spooned and leveled), plus more for pan
1/2 cup packed light-brown sugar
1/4 teaspoon salt

Ingredients-Cake
1/2 pound rhubarb, cut into 1/2-inch pieces
1 tablespoon light-brown sugar
1 cup all-purpose flour (spooned and leveled), divided
1/2 teaspoon baking powder
1/4 teaspoon salt
1/2 cup (1 stick) unsalted butter, room temperature
1 cup confectioners' sugar
2 large eggs
1/2 teaspoon pure vanilla extract

Directions
Preheat oven to 350 degrees. Butter an 8-inch square baking pan. Line with parchment paper, leaving a 2-inch overhang on two sides. Butter and flour parchment and pan, tapping out excess flour.

Make Streusel
Whisk together butter, brown sugar, and salt. Add flour and mix with a fork until large crumbs form. Refrigerate until ready to use.

Make cake
In a medium bowl, combine rhubarb, brown sugar, and 1/4 cup flour.
In another medium bowl, whisk 3/4 cup flour, baking powder, and salt.
In bowl of an electric mixer, beat butter and confectioners' sugar until light and fluffy.
Beat in eggs, one at a time.
With mixer on low, beat in vanilla, then flour mixture.
Spread batter in prepared pan. Sprinkle with rhubarb and top with streusel.
Bake cake until golden and a toothpick inserted in center comes out with moist crumbs attached, 45 to 50 minutes. Let cool completely in pan. Using paper overhang, lift cake from pan.

Cut into 16 bars.  NOTE: If you are not going to consume immediately store the cake in the fridge.  The moistness of the fruit accelerates spoilage.


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