Line a baking tray with parchment paper and place the pretzel hearts evenly spaced. This keeps them neat and makes cleanup easy.
Melt the white chocolate and colored candy melts separately in the microwave. Heat in short intervals, stirring between each, until smooth and fully melted.
Spoon or pipe the melted chocolate into the center of each pretzel heart. Make sure the chocolate fills the shape evenly for a clean finish.
While the chocolate is still soft, add sprinkles or drizzle with another color. This helps everything stick and look polished.
Place the tray in the refrigerator for about 15 minutes. Once the chocolate is firm, the pretzels are ready to enjoy.