Yankee Barbecue Beef - cooking recipe

Ingredients

6 Tbsp. butter, melted
6 Tbsp. flour
6 Tbsp. brown sugar
3 Tbsp. mustard
1 1/2 c. ketchup
1 tsp. salt
3 tsp. vinegar
1 1/2 ??? water

Preparation

Add to shredded roast beef.
Heat and serve.