Puffed Wheat Squares

1/3 cup butter or margarine
1/2 cup corn syrup
2/3 cup packed brown sugar
2 tbsp cocoa
1 tsp vanilla extract
8 cups Puffed Wheat

Combine the first 5 ingredients in a saucepan. Stir continually over medium heat until it starts to boil. Remove from heat. Measure the puffed wheat into a large bowl and pour the mixture over the top. Stir until well coated. Grease a pan. Press into the pan using a dampened spatula. Chill for 2 hours before cutting. Store at room temperature.