Almost Heinz Barbecue Sauce - cooking recipe

Ingredients

1 medium onion, chopped
1/4 cup butter
1 cup ketchup
1/2 cup beef stock
2 tablespoons Worcestershire sauce
2 tablespoons lemon juice
3 tablespoons red wine vinegar (can use cider vinegar)
1 teaspoon garlic powder
1/4 cup brown sugar (can use more)
1 1/2 teaspoons mustard powder
1 teaspoon season salt
1/2 teaspoon fresh ground black pepper (to taste)

Preparation

In a saucepan cook onion in butter until softened.
Add in all remaining ingredients; bring to a boil stirring.
Reduce heat to low and simmer uncovered for about 45 minutes to 1 hour.
Cool to room temperature then refrigerate overnight before using.