01 - Slice the peeled bananas and add them to a blender along with the Greek yogurt, honey or maple syrup, and vanilla extract. Blend until the mixture is completely smooth and creamy.
02 - Combine the dark chocolate and coconut oil in a microwave-safe bowl or set over a double boiler. Heat in 20-second intervals or gently simmer until fully melted, stirring until smooth and glossy.
03 - Pour half of the banana mixture into the popsicle molds, filling each about halfway. Drizzle a generous layer of melted chocolate over the banana layer in each mold.
04 - Gently drag a skewer or small knife through the chocolate and banana layers in each mold to create a marbled swirl effect. Avoid over-mixing to maintain distinct ribbons of chocolate.
05 - Divide the remaining banana mixture evenly among the molds, filling them to the top. Drizzle additional melted chocolate and repeat the swirling technique as desired.
06 - Place popsicle sticks firmly into the center of each mold. If using toppings, sprinkle chopped roasted nuts or mini chocolate chips over the exposed surface before freezing.
07 - Transfer the molds to the freezer and chill for a minimum of 4 hours, or until the popsicles are completely firm throughout.
08 - Briefly run the outside of each mold under warm water for 10 to 15 seconds to loosen. Gently pull the popsicle stick to release. Serve immediately.