Preheat oven to 350°F. Reserve 5 oz. of the chocolate; cut remaining 3 oz. chocolate into chunks. Mix sugar and unsweetened cocoa in large bowl until blended. Stir in eggs and oil. Mix in matzo meal, chocolate chunks and pecans. Spread into greased 8-inch square baking pan.
Bake 30 to 35 min. or until toothpick inserted in center comes out almost clean. (Do not overbake.) Cool in pan on wire rack.
Meanwhile, microwave reserved 5 oz. chocolate and margarine in large microwaveable bowl on HIGH 2 min. or until margarine is melted. Stir until chocolate is completely melted; set aside. Dissolve coffee in water. Stir in sour cream and vanilla. Add to chocolate mixture; mix well. Spread over cooled brownies. Cut into 16 squares to serve.
You'll know it's a special occasion when you enjoy a serving of these brownies!
To prepare this recipe for Passover, select food products that are kosher for Passover as needed. Consult with your rabbi if you have any questions.
Dress up the brownies for guests by placing each square in a paper muffin cup on a tray. This also makes handling and eating the brownies less messy.