Chocolate Praline Cake
["1/2 c. butter", "2 c. whipping cream", "1 c. firmly packed brown sugar", "3/4 c. coarsely chopped pecans", "1 (18 1/4 oz.) pkg. devil's food cake mix with pudding", "1 1/4 c. water", "1/3 c. oil", "3 eggs", "1/4 c. confectioners sugar", "1/4 tsp. vanilla", "whole pecans for garnish (optional)", "chocolate curls for garnish (optional)"]
["Heat oven to 325\u00b0.", "In a small, heavy saucepan, combine butter, 1/4 cup whipping cream and the brown sugar.", "Cook over low heat just until butter melts, stirring occasionally.", "Divide mixture between two 9-inch round cake pans.", "Sprinkle each evenly with chopped pecans."]
["butter", "whipping cream", "brown sugar", "pecans", "cake", "water", "oil", "eggs", "confectioners sugar", "vanilla", "pecans", "chocolate curls"]