Heat oven to 350. Lightly spray 2-9" round cake pans w/ cooking spray. In lg bowl, w/ mixer on low, beat cake mix, eggs, buttermilk, oil, and 1 tbsp coffee powder for 20 seconds. Beat on medium-high for 2 mins.
Spoon evenly into the pans. Bake about 24 mins, or until a toothpick inserted into center of each cake comes out clean. Don't over bake, this is one cake you want moist!
Cool for a half hour, remove from pans.Put fudge topping into a small microwaveable bowl and microwave until spreadable. Stir in remaining coffee powder. Place 1 cake layer on lg plate. Spread w/ half of the fudge mix. Spread remaining fudge mix onto one side of the other cake layer. Let stand for 10 mins to set. In medium bowl, whisk together pudding mix, milk and vanilla until it starts to thicken. Beat in cream cheese until fluffy. Beat in cool whip until just blended. Spread 1 cup of the mix over 1 of the cake layers. Top w/ 2nd cake layer, fudge side down, and spread the top and sides w/ remaining frosting. I sometimes sprinkle the top w/ a dusting of coffee powder.