2 teaspoons white stevia powder 1 1/2 cup flour 3/4 c cocoa powder 1/2 teaspoon salt 1/2 teaspoon baking soda 1 cup margarine 4 eggs 2 teaspoons vanilla 1 1/2 cup semisweet chocolate chunks 1 cup nuts

Preheat oven to 350°F (180°C). Grease lightly 13x9" pan. Stir stevia, flour, cocoa, soda, and salt; set aside. Mix melted nut butter, eggs and vanilla until smooth. Add flour mixture and stir until moistened. Fold in chocolate chunks and nuts. Spread batter in prepared pan. Bake for 35-40 minutes. Do not overbake.