Blitz the strawberries in a blender, and transfer the purée to a measuring cup.: The moment you blend the strawberries you will notice a bright, fragrant smell that is both sweet and slightly tart, which signals a fresh base for the lava effect. Use short pulses to break the berries down until you have a smooth but slightly textured purée that still holds color, and transfer it promptly to a measuring cup so it cools slightly. This step matters because a warm purée can melt the piña colada layer and blur the design, and a common mistake is overworking the blender which heats the fruit; stop blending as soon as it is smooth.
Rinse the blender, and throw in the pineapple, coconut milk, and banana. (Add the honey, too, if you’re using it.) Blitz until smooth.: After rinsing the blender you will eliminate lingering red streaks so the piña colada mixture stays pristine. When you add the cubed pineapple , creamy coconut milk , and ripe banana , the aroma shifts to tropical coconut and bright pineapple, a scent I always associate with vacation. Blend until the mixture is silky and uniform, watching for a glossy sheen that shows the fruit and fat have emulsified. Poor blending leads to grainy texture or uneven freezing; if you spot chunks, pulse a few more times and scrape down the sides.
Grab some popsicle molds and pour in a little of the strawberry purée into the bottom of each mold. Add the piña colada mixture until it reaches 3/4 of the way to the top. Add a little more strawberry purée to each mold, and then top off with the piña colada mixture.: Starting with a small amount of strawberry purée forms that vivid lava anchor at the base; visually it will look like a bright red button at the bottom of every mold. Pour carefully and use a spoon to nudge the purée into place if needed, because an even base helps the final swirl read clearly. Be mindful not to overfill at this stage, as the next layers require room to create the effect, and a frequent misstep is pouring too much strawberry which prevents proper layering.
Gently insert the popsicle sticks and put the filled molds in the freezer. Chill for 6 hours or until solid.: As you pour the blended pineapple , coconut milk , and banana mixture, watch the texture settle into the mold with a creamy, pale tone. Filling to about three quarters lets you alternate layers for maximum visual contrast while leaving space for the final strawberry accents. The piña colada layer should feel silky and slightly thick on the spoon, indicating adequate body; if it seems watery, check fruit ratios and consider a few extra seconds of blending. A common error here is filling too cautiously and ending up with too little contrast in the layers.
When the ice pops are frozen solid, quickly run them under hot water to loosen them from the molds. Devour immediately!: Alternating the strawberry and piña colada layers creates the lava effect, and when you drip a small bit of red back in you will see it sink slightly and create veins that look like lava flowing through cream. Finish by topping with the piña colada mix so there is a creamy cap; this helps the popsicle hold the stick upright. If you rush, the layers will blend too much, so pour slowly and let each addition settle for a beat. Avoid swirling vigorously, which eliminates the defined streaks that make the treat special.
Gently insert the popsicle sticks and put the filled molds in the freezer. Chill for 6 hours or until solid.: When the sticks are placed the molds will start to give off a faint coconut scent as they begin to freeze; set them on a level surface so they freeze straight. The freezing time is crucial for texture, six hours is a reliable baseline though factors like freezer temperature and mold thickness can extend this; I always plan overnight for peace of mind. A typical mistake is trying to unmold too early, which results in broken or slushy popsicles, so resist the urge and allow ample time to become solid.
When the ice pops are frozen solid, quickly run them under hot water to loosen them from the molds.: The final step rewards patience, as a quick run under warm water loosens the edges without melting the interior, producing a clean release and a satisfying snap. You will notice steam rise from the mold briefly and then the pop should slide free, unveiling the lava pattern in all its glory. Enjoy immediately for the best texture, because refreezing after partial thaw can create icier crystals. Common troubleshooting here is leaving the water too hot which softens the popsicle excessively, so use just warm water for a few seconds at the base.