Prep the mug: Make sure it’s clean and completely dry. If your mug is tall and narrow, lightly grease the inside with a tiny bit of neutral oil to help with release later.

Melt the chocolate: Add the dark chocolate and 1 to 2 tablespoons of milk or cream to the mug. Microwave in 20–30 second bursts, stirring between each, until smooth and glossy. If it looks thick or grainy, stir in another splash of milk.

Sweeten and season the chocolate: Mix in 1 teaspoon of honey or maple syrup (optional) and a tiny pinch of salt. Taste and adjust. You want it bittersweet but not harsh.

Create the chocolate base layer: Spoon about one-third of the melted chocolate back into the bottom of the mug in an even layer. Tap the mug gently on the counter to level it. Freeze for 5–7 minutes to set slightly.

Make the peanut-butter layer: In a small bowl, stir together peanut butter, 1–2 tablespoons of milk, 1–2 teaspoons sweetener, vanilla, and a pinch of salt until silky and spreadable. It should be thick but not stiff.

Add the peanut-butter layer: Spread a generous layer of the peanut-butter mixture over the chilled chocolate base. Smooth the top as evenly as you can. Sprinkle in optional add-ins like crushed peanuts for crunch.

Top with remaining chocolate: Pour or spoon the rest of the melted chocolate over the peanut butter, covering it completely. Tap the mug to remove air bubbles and level the top. If the chocolate stiffened while waiting, microwave it for 10 seconds to loosen.

Insert sticks: Gently press popsicle sticks or sturdy toothpicks into the center, spacing them so each pop will have enough support. You can plan for 2–3 pops depending on mug width.

Freeze until firm: Place the mug in the freezer for 1.5–2 hours, or until solid through the middle. If you’re in a rush, 60–75 minutes may be enough for smaller pops.

Release the pops: Warm the outside of the mug with your hands for 20–30 seconds or briefly run warm water over the outside (avoid getting water inside). Gently wiggle and pull the sticks to slide the pops out.

Finish and serve: Dust with flaky sea salt, drizzle with extra melted chocolate, or roll the edges in crushed peanuts. Enjoy right away or store for later.