Updated Monday, September 24th, 2012
Total Time: 20
Yield: 9 servings
Like the sour cream coffee cake that follows, crumb cake was a Northern European invention, originally prepared with a yeast-raised dough but simplified in the 20th century with the use of chemical leaveners like baking powder. It's generally thought of as a New York specialty, but it's found all through New England as well.
Preheat the oven to 375° and grease an 8-inch square baking pan.
Make the crumb topping: Combine the flour, brown sugar, walnuts, and cinnamon. Add the melted butter and mix with a fork. Set aside.
Next, make the cake: In a large bowl, whisk together the flour, sugar, baking powder, and salt. In a medium bowl, whisk together the butter, egg, milk, and vanilla. Add the wet mixture to the dry ingredients and fold with a rubber spatula until just combined. Spread the batter evenly into the prepared pan. Top with the crumb topping. Bake until a toothpick inserted into the center comes out clean, 25 to 30 minutes.
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