01 -
Cover an 8-inch square dish with parchment, letting some hang over the edges.
02 -
On low heat, stir together the chocolate and condensed milk until creamy. Mix in vanilla.
03 -
Split into three bowls. Tint one bowl red, another green, and keep the last plain.
04 -
Start with red, then plain, and finish with green. Use a knife to softly swirl them together.
05 -
Add sprinkles on top while the mix is still warm.
06 -
Refrigerate for 2 hours until solid, then cut into squares.