From the blog For Love of the Table
Pecan Streusel:
1/2 c. all-purpose flour
1/3 c. light or golden brown sugar
1/4 t. cinnamon
1/4 t. salt
4 T. unsalted butter, browned (see below) and cooled
1/2 c. pecans, lightly toasted and coarsely chopped
Combine the flour, brown sugar, cinnamon & salt in a medium-sized bowl. Drizzle the butter over and stir with a fork until the ingredients are combined and have formed clumps. Stir in the pecans and chill until ready to use.
Pumpkin Cake:
2 c. cake flour (7 1/2 oz.)
2 t. baking powder
1/2 t. baking soda
1/2 t. salt
1 t. cinnamon
1/2 t. ground cloves
1/2 t. nutmeg
1 c. solid pack pumpkin (or use fresh pumpkin purée—well dried)
1/2 c. milk
1 t. vanilla
1/2 c. (1 stick) unsalted butter, at room temperature
1 c. light or golden brown sugar
1/2 c. sugar
2 large eggs, at room temperature
Grease a 10- by 2--inch round cake pan, line with a round of parchment and grease the parchment. Flour the pan. Set aside.
Sift the dry ingredients together and set aside. In a small bowl, whisk together the pumpkin, milk and vanilla. Set aside.
Using a stand mixer fitted with the paddle attachment, cream the butter with the sugars until light and fluffy, stopping the mixer once or twice to scrape down the sides. This will take 3 to 5 minutes at medium-high speed. Beat in the eggs one at a time, scraping down the sides after each addition. Increase the speed to medium-high and briefly beat until the mixture lightens in color and expands in volume. By hand, fold in half of the dry ingredients, followed by all the liquid ingredients, followed by the remaining dry ingredients. Scrape the batter into the prepared pan and smooth the top. Sprinkle the streusel topping evenly over the cake.
Bake in a preheated 350° oven until a toothpick inserted in the center comes out clean—about 35 to 45 minutes. Let the cake cool in the pan for 10 to 15 minutes. Loosen the sides of the cake by running a thin knife around the edge of the pan. Turn the cake out of the pan. Cool the cake, streusel side up, on a wire rack.
Notes:
• To “brown” butter, place the butter in a small saucepan set over medium heat. As the butter begins to sputter and pop, whisk occasionally. The butter solids will begin to turn brown. When the solids are a deep golden brown and the butter has a pleasantly nutty aroma, transfer the butter to another container to stop the cooking process.
• If you don't have a 10-inch round cake pan, this cake may be baked in a 9- by 9- by 2-inch square baking pan. To see what it looks like when baked in a square pan, check out the post at Baking and Boys from a few weeks ago.
http://www.forloveofthetable.com/2011/11/pumpkin-cake-with-browned-butter.html