Instructions

1. Preheat oven to 350°F. Beat butter and granulated sugar in a large bowl with a mixer at medium speed until fluffy. Add eggs, one at a time, beating well after each addition. Beat in sour cream and vanilla until blended.
2. Whisk together flour, baking powder, and salt in a bowl. Gradually add to butter mixture, beating just until blended.
3. Spoon half of batter into a 12- to 15-cup Bundt pan sprayed with baking spray with flour.
4. Stir together nuts, brown sugar, and melted butter in a small bowl. Sprinkle half of mixture over batter in pan. Spoon remaining batter over nut mixture. Sprinkle with remaining nut mixture.
5. Bake 40 to 50 minutes or until a wooden pick inserted comes out with moist crumbs attached. Cool in pan 5 minutes; invert onto a wire rack, and cool completely.
6. Sprinkle with powdered sugar and drizzle with caramel syrup before serving.