Honey Bun Cake

1 pkg yellow or butter cake mix
2 sticks (1 cup) butter, softened
4 eggs
1-8 oz container sour cream
1/2 cup brown sugar
2 tsp ground cinnamon
1/2 tsp nutmeg
1 cup powdered sugar
1 Tbsp milk
1 tsp vanilla

Heat oven to 350°F. Generously grease the bottom of a 9 x 13 pan. Remove 1/2 cup dry cake mix, reserve. Beat remaining dry cake mix, butter, eggs and sour cream in large bowl on medium speed 2 minutes, scraping bowl occasionally. Spread half of the batter in pan. Stir together reserved dry cake mix, brown sugar, cinnamon and nutmeg; sprinkle over batter in pan. Carefully spread remaining batter evenly over cinnamon mixture. (To make spreading easier, drop batter by dollops over pecan mixture, then spread carefully with an offset spatula.) Bake 40-45 minutes or until deep golden brown and cake springs back when lightly touched in center. Stir powdered sugar, milk and vanilla until thin enough to drizzle, stirring in additional milk , 1 tsp. at a time if necessary. Poke top of warm cake several times with fork; spread over top of cake. Cool completely, about 1 hour. Store covered. Serves 12 (or 6 if everyone likes this as much as my bunch does, lol).