¼ cup (4 tablespoons) unsalted butter, cut into chunks
⅛ teaspoon salt
3 tablespoons creamy peanut butter
2 teaspoons vanilla
Method
Combine all ingredients, through the peanut butter, in the top of a double boiler (or a heat-proof bowl). Bring 2 inches of water in a saucepan under the double boiler. Once the water boils, remove the pan from the heat, and place the bowl with the chocolate mixture over the hot water.
Let the mixture stand, stirring occasionally until melted and smooth - about 15 minutes. Stir in vanilla.
Keep tightly covered in the refrigerator for up to 2 weeks. Warm it in the microwave just prior to serving.
Recipe by Kitchen Meets Girl at https://kitchenmeetsgirl.com/peanut-butter-hot-fudge-sauce/