Step 1

In a small saucepan over medium-low heat, melt the butter. Once the butter is completely melted, stir in the brown sugar. Whisk the mixture briskly and constantly for 2 minutes on medium-low heat.

Step 2

The mixture will barely start to bubble. Briskly stir in the heavy whipping cream.

Step 3

Add in the vanilla extract. Raise the heat to medium, and briskly stir for another 2 minutes.

Step 4

Remove the mixture from the heat. It will be relatively thick, but not as thick as a caramel sauce. Pour the mixture into a heat-safe jar, and place it in the fridge.

Step 5

After about 30 to 45 minutes, the mixture will be a thick and delicious caramel sauce. Now it's time to stir in a little bit of salt to your desired preference. Start with 1/2 teaspoon, and increase the amount of salt to desired preference.