Step 1

Preheat the waffle iron to medium-high heat.

Step 2

Whisk the sugar, egg whites, vanilla, and salt in a large bowl until frothy. Whisk in the butter, flour, and cinnamon until blended. Stir in the chocolate chips.

Step 3

Brush the waffle cooking surfaces with melted butter. Pour 1/2 cupfuls of batter into the waffle iron and cook until golden brown, about 3 minutes. Transfer the pizzelles to a cooling rack. Cool completely. Store the pizzelles airtight at room temperature.