In a wide, shallow, microwave-safe bowl, melt the white chocolate chips for 1 minute. Stir until the bowl is no longer warm. If needed, microwave an additional 20-30 seconds, then stir until the chips are fully melted.
Dip and swirl your coupe glass into the white chocolate, letting excess drip back into the bowl. Sprinkle the funfetti onto a plate and swirl the rim into the sprinkles. Shake off excess.
In a shaker, combine the vanilla vodka, amaretto, white chocolate liqueur, and heavy cream. Fill with ice and shake until cold. Strain into your prepared cocktail glass. Cheers!