Cookie Ice Cream Sandwiches (Like a Chipwich!)

Bahan-bahan (12 porsi)

• 2 and 1/4 cups (281g) all-purpose flour (spooned & leveled)
• 1 and 1/2 teaspoons cornstarch
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 3/4 cup (12 Tablespoons; 170g) unsalted butter, softened to room temperature
• 3/4 cup (150g) packed light or dark brown sugar
• 1/2 cup (100g) granulated sugar
• 1 large egg + 1 egg yolk, at room temperature
• 2 teaspoons pure vanilla extract
• 1 and 1/4 cups (225g) mini semi-sweet chocolate chips
• 3 cups (about 540g) vanilla ice cream (or your desired flavor)
• 1 cup mini chocolate chips (180g), sprinkles (150g), or finely chopped nuts (100g)