Waffles:

2 large eggs, separated, at room temperature
2 cups unsweetened vanilla-flavored almond milk
3 tablespoons sugar
1 teaspoon pure vanilla extract
3/4 teaspoon pure almond extract
Zest of 1 large lemon
1 1/2 cups all-purpose flour
1/2 cup almond flour
2 teaspoons baking powder
1/4 teaspoon fine sea salt
1 stick unsalted butter, melted
3/4 cup mini chocolate chips, optional
Special equipment: an electric waffle maker