Name: Chocolate Cream and Cinnamon Sugar
Yield: makes about 2½ cups (enough to fill about 16 sufganiyot) Servings
Ingredients: 2 cups whole milk; 4 large egg yolks; ⅔ cup sugar; ¼ cup natural unsweetened cocoa powder; 3 tablespoons cornstarch; ¼ teaspoon kosher salt; 4 oz. semisweet chocolate, chopped; 1/2 cup sugar; 2 teaspoons ground cinnamon

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Once you master the sufganiyot (click for recipe) technique, you can fill it with whatever you like, including this chocolate cream.

Recipe notes