Blend the raspberries until completely smooth, then strain through a fine-mesh sieve to remove all seeds—this creates a silky texture that won't be gritty in your final truffles. Combine the strained puree with sugar in a saucepan and bring to a boil over medium-high heat. Once boiling, reduce heat to low and simmer for about 25 minutes, stirring occasionally, until the mixture reduces by half and becomes thick and jammy. This concentration of flavor is essential for rich, intense truffles. Stir in the cream and water until fully combined, then remove from heat and let cool for about 10 minutes.

Chop the white chocolate into small, uniform pieces and place in a heatproof bowl. Pour the warm raspberry puree from Step 1 over the chopped chocolate and let it sit undisturbed for 1-2 minutes to allow the residual heat to begin melting the chocolate. Gently stir until completely smooth and well combined. Stir in the raspberry liqueur for an extra layer of flavor and sophistication. I like to add the liqueur after the ganache cools slightly so the alcohol flavor stays bright rather than cooking off entirely.

Transfer the ganache to the refrigerator and chill for at least 2 hours until it becomes firm enough to scoop but still slightly soft—it should hold its shape when rolled but not be rock-hard. This timing is crucial; if it's too warm, the balls will be impossible to shape, and if it's too cold, it will crack when you try to form it.

Using a small melon baller, cookie scoop, or two spoons, portion the chilled ganache into approximately 1-inch balls and place them on a parchment paper-lined baking sheet. Work quickly but gently to prevent the ganache from warming too much in your hands. I find that slightly damp hands help prevent sticking without damaging the delicate ganache. Once all balls are shaped, return them to the refrigerator while you prepare the chocolate coating.

Melt the dark chocolate using a double boiler or microwave in 30-second intervals, stirring between each interval until smooth and glossy (around 88-90°F is ideal for dipping). Remove the ganache balls from the refrigerator and, working with one or two at a time, carefully dip each ball into the melted dark chocolate using a fork or dipping tool, allowing excess chocolate to drip off. Place the coated truffles back on a clean parchment paper-lined baking sheet.

Refrigerate the coated truffles for about 25 minutes until the dark chocolate shell is completely set and firm to the touch. If desired, you can drizzle or dip the truffles in melted pink chocolate for a decorative finish—this step adds visual appeal and an extra layer of sweetness. Once decorated and set, store the truffles in an airtight container in the refrigerator or freezer until ready to serve.