1/2 cup butter
1/4 cup heavy whipping cream
1 cup packed brown sugar
3/4 cup chopped pecans
1 (18.25 ounce) package devil's food cake mix with pudding
1 1/4 cups water
1/3 cup vegetable oil
1 3/4 cups heavy whipping cream
1/4 cup confectioners' sugar
1/4 teaspoon vanilla extract
Preheat oven to 165 degrees C. In a saucepan, combine the butter or margarine, 1/4 c whipping cream and brown sugar. Cook over low heat until he butter is just melted, stirring occasionally. Pour into two 8 or 9 inch round cake pans. Sprinkle evenly with the chopped pecans.
In a large bowl, combine the cake mix, water, oil and eggs at low speed until moistened. Beat 2 minutes at the highest speed. Carefully spoon the batter over the pecan mixture.
Bake at 165 degrees C for 35 to 45 minutes, or until the cake springs back when lightly touched in the center. Cool 5 minutes. Remove from the pans and cool completely.
In a small bowl, beat the 1 3/4 cups whipping cream until soft peaks form. Blend in the confectioners' sugar and vanilla extract. Beat until stiff peaks form. To assemble the cake, place one layer on a serving plate, praline side up. Spread with half of the whipped cream. Top with the second layer. Frost with the remaining whipped cream. Store in refrigerator.