Place 18 mini muffin liners on a cookie sheet. In a small mixing bowl, beat the peanut butter, coconut sugar, and softened butter together until it is creamy. Place in the freezer.
In a small saucepan, melt 1/2 cup of chocolate chips over low heat. Spread some of the chocolate into the bottoms of the muffin liners. Place in the freezer and freeze until they are solid.
Melt the remaining chocolate chips. Remove the muffin liners and the peanut butter mixture from the freezer. Place dollops of the peanut butter mixture into the muffin and liners and cover with chocolate.