Easy Homemade Caramel Sauce

1 Pour sugar into an even layer in a large sauce pan. Heat on medium-high heat, whisking the sugar until melted. The sugar will clump up first, but will eventually completely melt. This will take about 10 minutes.
2 Once the sugar has melted, stop whisking and allow it to cook until the sugar turns to a little darker amber color and the mixture has a nutty aroma. Remove caramel from the heat.
3 Add butter and whisk until combined. The mixture will bubble up, but keep whisking until all the butter has melted and combined.
4 Next, slowly pour the heavy cream into the caramel and whisk until combined.
5 Cool for about 10-15 minutes before using, or store leftovers in a jar with a lid. Refrigerate up to 2 weeks.