Cream the butter and sugar. Add eggs one at a time, then vanilla. Mix in sour cream then baking mix.
Spoon half of the batter into pan. Then half of the filling. Repeat with the rest of batter and filling. Use a butter knife to swirl the filling with the batter in the pan.
Bake for 45 to 50 minutes, or until toothpick comes out clean. Cool 10 minutes before removing from pan.
Glaze
Mix together glaze ingredients. Drizzle the glaze over cooled cake.