Here is a basic yellow cake recipe: Let me know if it works for you. I always like to hear from my followers.
3/4 c margarine, butter or shortening
1 1/2 c granulated sugar
3/4 c milk (or pareve soy milk)
1 tsp almond extract
2 1/4 c cake flour
2 1/2 tsp baking powder
3/4 tsp salt
Grease and flour a 10" round pan. Preheat oven to 375'F. Place all ingredients in bowl of electric mixer. Mix on low speed until thoroughly combined, scraping bowl frequently. Increase speed to medium and beat for four minutes. Pour into pan; smooth top of batter. Bake 25-30 minutes, until cake tests done. Do not overbake. Cool on wire rack for 10 minutes, then remove cake from pan and continue cooling on rack.
7.6.06 Update: By the way, Manischewitz came out with a yellow cake mix which is Pareve. If any of you try it, please let me know if/how it compares with the Duncan Heinz mix.
11.1.06 Update: Duncan-Hines is taking the dairy ingredients out of their mixes, and they will once again be certified OU Pareve.