Butter Barbecue Sauce

Ingredients

• 1 stick of butter
• 1/2 cup onion, chopped
• 1/2 cup ketchup
• 1/4 cup light brown sugar, packed
• 3 tbs Worcestershire sauce
• 2 tsp chili powder
• 2 tsp kosher salt
• 1 tsp black pepper
• dash Tabasco sauce