Line a 12-cup muffin tin with paper liners.
In a microwave-safe bowl, heat 1/2 cup peanut butter and honey together for about 1 minute. Stir until smooth.
Stir in the oats and mix until fully coated.
Divide the mixture into the muffin cups and press into the bottom and up the sides to create a cup shape. Freeze for 5–10 minutes.
Fill each cup with 1–2 teaspoons of peanut butter. Freeze again for 5 minutes.
In a small microwave-safe bowl, melt chocolate chips with coconut oil in 30-second intervals until smooth.
Spoon melted chocolate over each peanut butter cup.
Sprinkle with mini chocolate chips and chill until set. Store in the refrigerator.