Line a mini muffin pan with mini liners.
Melt together the chocolate chips and coconut oil in either the microwave or over a double boiler until completely melted and smooth.
Once the chocolate is melted, pour about 1 teaspoon of melted chocolate into the bottom of each liner and use a spoon to spread the chocolate around to cover the entire bottom of the liner. Once all liners are lined with chocolate, transfer your muffin pan to the freezer to set and set the remaining melted chocolate aside.
While the chocolate sets, add all peanut butter filling ingredients to a bowl and stir together until smooth, slightly thick, and combined.
Spoon about 1 teaspoon of the peanut butter filling mixture into the palm of your hands and roll it into a ball, then flatten it slightly to form a disk. Remove the muffin tin from the freezer and place one disk on top of each cup lined with chocolate. Repeat this process until all cups have been filled with peanut butter.
Pour 1-2 teaspoons of melted chocolate over each peanut butter cup, making sure you completely cover the peanut butter inside. Once all peanut butter cups are filled with chocolate, place a strawberry slice on top of each cup, then transfer the pan back into the freezer for 10-15 minutes or until the chocolate is completely set. Remove the strawberry peanut butter cups from the freezer, transfer to an airtight container and store in the fridge or enjoy right away!