Add the chocolate chips and melting chocolate to a bowl and microwave in 30 second intervals until melted, stirred occasionally for a smooth finish.2. Place a thin layer of melted chocolate in the bottom of each candy mold slot so that it completely covers the bottom of the mold slots. If you want, you can also coat the sides. 3. Tap the candy mold onto the counter to ensure the chocolate layer is evenly dispersed and then place in the freezer for 2 minutes to harder a bit.4. While the candy mold is in the freezer, mix peanut butter, powdered sugar, and melted butter in a bowl and stir until well-blended.5. Take the candy mold out of the freezer and add a dollop of peanut butter mixture to each candy mold slot. Tap the mold on the counter again to even out the peanut butter. At this point, I like to place the candy mold tray back in the freezer for another 2 minutes just to help with the next step, but you don't have to.6. Add a layer of chocolate on top of the peanut butter in each candy mold slot. Tap the candy mold tray on the counter again to get a smoothed out chocolate layer in each slot.7. Place the candy mold tray in the freezer for a final 30 min to 1 hour until the candy is completely hardened.8. Take the candy out of the molds carefully and store in the fridge for firmer candy or at room temperature for softer candy.