Cooks.com, but you'll find variations on the Internet. As always, experiment. The following recipe uses a German Chocolate cake mix, but you can always use your own recipe and add raisins.
Chocolate Covered Raisin Bundt Cake
1 package German Chocolate basic bundt cake mix
1/2 cup water
1/2 cup sour cream
1/3 cup sweet butter, softened
1/2 cup raisins
Preheat oven to 350 degrees. Lightly grease bottom only of 9x13 inch pan.
In large bowl, blend Packet 1 (cake mix) and next 4 ingredients until moistened. Beat 2 minutes at medium speed (portable mixer use highest speed). Fold in raisins. Pour into prepared pan.
Bake at 350 degrees for 30 to 40 minutes or until toothpick inserted in center comes out clean.
Cool in pan on cooling rack.
Now here is what I consider optional.. and if you're making your own German Chocolate Cake, you don't need to make a glaze. But this is called Chocolate Covered Raisin Cake, so you might make one from scratch or
Blend Packet 2 (glaze mix) with 1- 2/3 tablespoons warm water. Drizzle over cooled cake.