Toffee Fudge Brownies

Step 1: Position rack in center of oven and preheat to 325.

Step 2: Grease and flour 9 inch square baking pan.

Step 3: Combine toffee and walnuts in work bowl of processor and chop coarsely using 6 to 8 inch steel knife.

Step 4: Remove from work bowl and set aside.

Step 5: Combine sugar and chocolate in work bowl and mix using 6 on/off turns, then process until chocolate is as fine as sugar, about 1 minute.

Step 6: Add butter and blend 1 minute.

Step 7: Add eggs, vanilla and salt and blend until fluffy, about 40 seconds, stopping as necessary to scrape down sides of work bowl.

Step 8: Add flour and toffee mixture and blend using 4 to 5 on/off turns, just until flour is incorporated; do not overprocess (remove steel knife and blend mixture gently with spatula if necessary to mix in flour completely).

Step 9: Turn batter into prepared pan, spreading evenly. Bake until tester inserted in center comes out almost clean, about 50 minutes (for firmer, cakelike brownies, bake about 5 minutes longer).

Step 10: Let cool in pan on rack.

Step 11: Cut into 1 3/4-inch squares.

Step 12: Store in airtight container.