Place the unsalted butter in a microwave-safe bowl.
Cover the bowl with a tiny plate before placing it in the microwave.
Microwave for 30 to 60 seconds at 50% power to melt the butter.
Watch butter and stop microwaving as soon as the butter has melted.
Remove from the microwave.
Add sugar to the bowl.
With a spoon, stir the butter and sugar together until the sugar is dissolved.
When it is cooled, add heavy-duty mayo, tomato sauce, tomato paste, paprika, white vinegar, lime juice, salt, and black pepper.
Mix all the ingredients with a spoon until well-mixed.
Keep it in the fridge covered with plastic wrap for an hour for optimal results.
Take the sauce out of the fridge and enjoy!