1 cup butter, brought to room temperature
½ cup vegetable shortening
2½ cups firmly packed brown sugar
½ cup granulated sugar
6 large eggs, lightly beaten
3 cups all-purpose flour, sifted
1 teaspoon baking powder
1 cup milk
1 teaspoon vanilla extract
2 cups chopped pecans, toasted
In a stand mixer with the whisk attachment, beat the butter and shortening at medium speed until they are well-combined.
Add the sugars and continue beating until the mixture is light and fluffy
Add the eggs, one at a time, waiting to add the next egg until the first one is fully incorporated.
In a small bowl, combine the flour and the baking powder.
Add half of the flour mixture to the batter and beat it in at low speed. Add the milk (still beating at low speed) before putting in the remaining flour.
Fold in the vanilla extract and toasted pecans.
Grease a 12-cup bundt pan and pour the batter into the pan. Place the pan into a cold oven and set the temperature to 300 degrees F.
Bake for 90 minutes, until a toothpick inserted into the center comes out clean. Allow the pan to cool on a wire rack for 15 minutes before removing the cake.
Allow the cake to cool completely before icing (if desired).