In a stand mixer, blend all the ingredients——(except your favorite sugar-free chocolate chips and crushed peanuts)—together until thoroughly combined. Taste and adjust Stevia if needed.
Pour peanut butter filling into mini muffin cups lined with silicone liners or paper liner for easy removal. Freeze for 1 hour before coating with chocolate.
To make outer chocolate coating, simply melt chocolate using a double boiler method or melt in a microwaveable bowl, at 30-second intervals, stirring until smooth.
Remove frozen peanut butter mini cups out of the silicone molds and place onto a baking sheet pan lined with parchment paper. Dip one frozen peanut butter cup into melted chocolate at a time. Remove with a fork and tap excess chocolate on the side of the bowl.
If desired, immediately top each with crushed peanuts before the chocolate hardens. Continue with remaining melted chocolate and mini cups then return to the freezer for at least 30 minutes or until ready to serve. Allow about 5 minutes to come to room temperature to enjoy.
Storage; Store frozen healthy peanut butter cups in an airtight container or sealed container in the freezer for up to 6 months. Nutritional information below includes using the chocolate chips for coating these frozen Reese's cups, but does not include optional crushed peanuts.