Melt the chocolate in a microwave or double boiler. Pour the chocolate onto the lined sheet tray and use an offset spatula to spread out evenly, filling the whole pan. Evenly sprinkle the toppings on top.
Pop in the fridge or freezer until totally firm, about 1 hour. Break into pieces.
Emma is the food editor at Food52. Before this, she worked a lot of odd jobs, all at the same time. Think: stir-frying noodles on the fly, baking dozens of pastries at 3 a.m., and writing about the history of pie in North Carolina. Now she lives in New Jersey with her husband and their cat, Butter. Stay tuned every Tuesday for Emma's award-winning column, Big Little Recipes (also the cookbook in October 2021!). And see what she's up to on Instagram at @emmalaperruque.