Melt the Chocolate: In a microwave-safe bowl, melt half of the chocolate chips in 30-second intervals, stirring between each round, until smooth.
Layer the Bottom: Line a muffin tin with paper cupcake liners and spoon a small amount of melted chocolate into each liner, spreading it evenly. Place in the freezer for 10 minutes to set.
Prepare the Peanut Butter Filling: In a mixing bowl, combine peanut butter, powdered sugar, melted butter, vanilla extract, and salt. Stir until smooth and creamy.
Add the Filling: Scoop about a teaspoon of peanut butter mixture onto the hardened chocolate base, gently spreading it without touching the edges.
Top with More Chocolate: Melt the remaining chocolate chips and spoon over the peanut butter filling, ensuring full coverage.
Chill and Set: Place the muffin tin back into the freezer for 15-20 minutes or until the chocolate is firm.
Enjoy: Once fully set, remove the peanut butter cups from the liners and enjoy your homemade treats!