1.Whisk Together The Ketchup, Water, White Sugar, Brown Sugar, Vinegar, Mustard, Salt, Pepper, And Paprika In A Large Saucepan. Bring To A Simmer Over Medium-High Heat; Reduce Heat To Medium-Low And Simmer 15 Minutes. 2.Meanwhile, Heat A Large Skillet Over Medium-High Heat; Cook And Stir The Ground Beef And Onion In The Hot Skillet Until The Beef Is Crumbly, Evenly Browned, And No Longer Pink; Drain And Discard Any Excess Grease. Stir The Beef Into The Simmering Barbeque Sauce. Simmer Together For 10 Minutes. Spoon Into The Buns To Serve.