Line a mini muffin pan (or normal muffin pan) with paper liners. You can also use silicone pans which don’t require any liners.
Prepare the cookie oat layer. Add all of the ingredients for the oat layer into a large bowl and mix vigorously with a spoon until it forms a thick dough.
Scoop ~1.5 teaspoons of the oat mixture into each muffin cup. Firmly press the oat layer evenly down into the pan until it has a smooth top. Transfer the pan to the freezer and allow the layer to harden for ~15 minutes while you make the second layer.
Prepare the peanut butter caramel layer. Add all of the ingredients for the peanut butter caramel layer to a bowl and mix until combined.
Scoop ~1 teaspoon of the peanut butter caramel over the top of the oat layer. Quickly smooth the caramel layer evenly over the oat layer until it has a smooth top. Transfer the pan to the freezer for ~15 minutes to harden while yuou prepare the third layer.
Prepare the chocolate layer. Place the chocolate chips and coconut oil in a microwave-safe bowl and microwave for 20-second increments, stirring after each increment until the chocolate is melted and glossy.
Scoop 1 teaspoon of the chocolate over the caramel layer. Evenly spread the chocolate evenly with your finger or a spoon immediately after to avoid the chocolate from hardening too quickly. Repeat until every cup is topped with chocolate. Transfer the pan back to the freezer for 10 minutes.
Prepare the chocolate drizzle. Place the chocolate chips and coconut oil in a microwave-safe bowl and microwave in 20-second increments, stirring after each increment until the chocolate is melted and glossy. Transfer the chocolate into a small plastic bag or piping bag. Drizzle the chocolate over each in a twix zig-zag pattern. Return the pan to the freezer to set.
Once the cups are set, remove them from the pan and store them in a freezer-safe bag and store them in the freezer.