Giant Ice Cream Sandwich with Chocolate Chips

Ingredients

• Cookies

  • 1 ½ cups (225 g) unbleached all-purpose flour
  • ½ tsp baking powder
  • ½ tsp baking soda
  • 1 pinch salt
  • 1 cup (210 g) brown sugar
  • ¼ cup (55 g) sugar
  • ½ cup (125 ml) mayonnaise (see note)
  • 1 tsp (5 ml) vanilla
  • 2 eggs
  • 1 cup (200 g) semi-sweet or milk chocolate chips

• Filling

  • 2 cups (500 ml) chocolate ice cream, softened
  • 2 cups (500 ml) vanilla ice cream, softened