In a medium bowl, beat butter, jam, and salt with a hand mixer on medium speed until smooth and well combined, stopping occasionally to scrape sides of bowl.
Gradually add confectioners’ sugar, beating just until combined. Add buttermilk; beat on medium speed until fluffy, about 2 minutes, stopping occasionally to scrape sides of bowl. Use immediately.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/mini-peanut-butter-jelly-cupcakes-recipe/