Chocolate-Vanilla Marbled Waffles from Encyclopedia of Chocolate: Essential Recipes and Techniques by Frédéric Bau and École du Grand Chocolat Valrhona

Ingredients

• 1 cup (10 ½ oz./300 g) maple syrup
• Scant ⅔ cup (150 ml) whipping cream
• 3 ½ oz. (100 g) milk chocolate, 40 percent cocoa
• 1 generous cup (110 g) all-purpose flour
• 1 ¾ oz. (50 g) bittersweet chocolate, 70 percent cocoa
• ½ cup (125 ml) whole milk
• 1 tablespoon plus 1 teaspoon (20 g or 20 ml) vanilla extract
• ¼ cup (1 ¾ oz./50 g) granulated sugar
• 1 stick plus 1 teaspoon (4 ⅔ oz./130 g) butter
• Scant ½ teaspoon (2 g) table salt
• 3 egg whites
• Vanilla ice cream