In a large pot, add milk, half & half. Heat over medium heat until hot but not boiling.: You will notice a soft sheen on the surface as the milk and half and half begin to warm, and a faint dairy aroma will rise. Keep the heat on medium so the liquid heats evenly, stirring occasionally to blend the two dairy components. This gentle warming prevents scorching, which would make the base taste burnt. A typical error is rushing the heat, causing a film to form and uneven warmth, so watch for tiny steam wisps and avoid boiling.
Add white chocolate chips and stir until completely melted.: As the pot warms, look for tiny bubbles forming along the edge, and you will hear a quiet, steady simmer sound rather than a vigorous roar. The surface will hold a gentle tremble, not rapid bubbling. Maintaining this range preserves the delicate proteins in the dairy and helps the white chocolate chips integrate smoothly. If you let it boil, the mixture can separate and the flavor will dull, so reduce heat at the first signs of rolling bubbles.
Add extract and food coloring. Stir well.: Once the liquid is warm, adding the white chocolate chips will introduce a sweet aroma and a thickening action as they melt. Stir slowly and continually, watching the chips disappear into a glossy, homogeneous mixture that coats the spoon. The sound becomes quieter and the texture more syrupy, signaling readiness. Overstirring very aggressively can incorporate air and change the mouthfeel, while not stirring enough risks grainy pockets of chocolate, so keep a steady, patient motion.
Top with whipped cream and Andes. Serve warm.: After the chocolate has fully melted, adding the mint extract releases a bright, menthol lift and aromatic top notes that float above the warmth. The food coloring will tint the mix; a drop or two transforms the cup visually. Stir gently to distribute both. If you add extract too early into high heat, the volatile oils can dissipate and the flavor will be muted, so incorporate them off direct heat or at low temperature.
Stir well.: As you stir, breathe in the combined aroma of sweet chocolate and cooling mint, and watch the liquid turn uniformly colored and slightly thicker. This step blends the elements so each sip is balanced, and it smooths any lingering chocolate particles into the base. A common oversight is to stop stirring too soon, leaving streaks of color or intensity, so take an extra 30 seconds to ensure uniformity.
Top with whipped cream and Andes.: When you ladle the drink into mugs, crown each with a dollop of whipped cream and a sprinkle of crushed Andes mints . The whipped cream adds a cool, airy contrast to the warm liquid, and the crushed mints provide a satisfying crunch and mint oil burst. Add these just before serving, because the whipped cream will deflate if it sits too long, and the candy will begin to dissolve into the surface over time.
Serve warm.: Serve the cups while the drink still steams gently, so the aroma is front and center. The foam and garnishes should be intact, and the first sip should deliver creamy warmth followed by a crisp mint note. If it cools too much, rewarm gently while stirring to return the smooth texture, and avoid boiling during reheating to protect the emulsion.
