My Mom-in-law requested I get her this recipe a LONG time ago. And I'm just now getting it up. I promise it's amazing. In fact, I promise you will never eat another plain chocolate cake, if you love Kahlua. If you don't, well that's your problem. I modified (do I even have to SAY this anymore) this recipe from a standard chocolate cake recipe in my better homes and gardens cookbook.
3/4 cup of butter
1 cup all purpose whole wheat white flour
1 cup Pastry Flour (Arrowhead Mills)
2 tsp Vital Wheat Gluten (Arrowhead Mills)
3/4 unsweetened cocoa powder
1 tsp baking soda
3/4 tsp baking powder
1/2 tsp salt
2 cups sugar
2 tsp vanilla
1 cup milk
1/2 cup Kahlua
Let butter and eggs stand at room temperature for 30 minutes
Lightly grease 2 round (8" or 9") cake pans with butter (not the butter that's sitting out)
Place waxed paper in the bottom of the cake pans.
Preheat oven to 350 degrees
In medium bowl mix together all flour, gluten, cocoa powder, baking soda, baking powder, and salt.
In large pyrex measuring cup (liquid) mix together milk and Kahlua.
In a large mixing bowl beat butter with electric mixer on high for 30 seconds. Add sugar, a 1/4 cup at a time, beating on medium after every addition. After all sugar has been added scrape sides of bowl and beat for an additional 2 minutes. Add eggs 1 at a time, beating after each addition. Add vanilla, beat.
Alternate adding the flour mixture and the milk mixture to the butter mixture, beating on low speed after every addition until just combined. Once everything has been added, scrape the sides of the bowl and beat for about 20-30 seconds more. Spread the batter evenly into your cake pans.
Bake in oven for 35-40 minutes for until a wooden toothpick inserted near centers comes out clean. Cool in pans for 10 minutes, remove from pans. I use the Pampered Chef Skinny Scraper to make sure that the edges don't stick when I remove the cake from the pans. Peel off the wax paper. Cool on racks. Oh, you're so close to tasty goodness. I'll post my icing recipe later. It's a chocolate coffee icing. Let the suspense build!