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1 cup unsalted butter, at room temperature
1 1/2 cups granulated sugar
1 1/2 cups brown sugar
4 large eggs, at room temperature
2 oz red food coloring (optional)
4 tsp pure vanilla extract
2 1/2 cups all-purpose flour
6 tbsp unsweetened cocoa powder
1/2 tsp salt
Preheat the oven to 350 degrees F. Butter and flour an 9 X 13 clear glass baking pan.
In the bowl of a stand mixer fitted with the paddle attachment, beat
together the butter and sugar on medium speed until light and fluffy,
about 2 minutes. Add eggs one at a time, mixing well after each
addition, then stir in food coloring (if not using food coloring add 4 T
of water or milk) and vanilla, mix until the color is fully
incorporated. Mix flour, cocoa and salt in a separate bowl. Slowly add
in the flour mixture being very careful not to over mix.. Do not over
mix. The batter will be very thick.
Remove the bowl from the mixer and stir up the batter with a rubber
spatula once or twice just to ensure all of the flour has incorporated
from the sides of the bowl and there isn’t anything stuck on the bottom
of the bowl. You’ll want one uniformly colored (red) batter.
Pour the batter into the prepared pan and bake for 30-40 minutes. 35
minutes for a thin crust on top and gooey underneath. Set aside to
cool, cut into bars and serve.