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 was the food editor at Food52. She created the award-winning column, Big Little Recipes, and turned it into a cookbook in 2021. These days, she's a senior editor at Bon Appétit, leading digital cooking coverage. Say hello on Instagram at @emmalaperruque.