Butter Tart Squares

Ingredients

• 1 cup (8 oz – 240 gm) butter or margarine
• 2/3 cup, packed (4¼ oz – 120 gm) brown sugar
• 2½ cups (10 oz – 280 gm) all purpose white flour
• 4 eggs
• 2 cups, packed (12¾ oz – 360 gm) brown sugar
• 2 tsp (10 ml) flour
• 1 tsp (5 ml) baking powder
• 1/2 tsp (3 ml) salt
• 1/2 cup (4 oz – 120 gm) melted butter
• 2 tsp (10 ml) vanilla extract
• 3 cups (1lb – 450 gm) raisins
• 1 cup (4¼ oz – 122 gm) chopped walnuts