1/2 cup granulated sugar
1 teaspoon cinnamon
2 cans Pillsbury Grands! Homestyle refrigerated buttermilk buscuits
1/2 cup chopped walnuts, if desired
1/2 cup raisins, if desired
1 cup firmly packed brown sugar
3/4 cup butter or margarine, melted

Instructions: 

Heat oven to 350 degrees F. Lightly grease 12-cup fluted tube pan with shortening or cooking spray.  In large-storage plastic food bag, mix granulated sugar and cinnamon.

Separate dough into 16 biscuits: cut each into quarters. Shake in bag to coat. Arrange in pan, adding walnuts and raisins among the biscuit pieces if desired.

In a small bowl, mix brown sugar and butter; pour over biscuit pieces. Bake 28 to 32 minutes or until golden brown and no longer doughy in the center. Cool in pan 10 minutes.

Turn upside down onto serving plate; pull apart to serve. Serve warm.
 

Source: http://www.pillsbury.com