Santa's Favorite Cookies - Big Recipe

Ingredients

• water, to taste
• 6 ounces bittersweet chocolate, chopped
• 2 1/4 cups all-purpose flour
• 3 (1.38-ounce) envelopes hot cocoa mix, without marshmallows
• 1 teaspoon instant espresso powder
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/4 teaspoon kosher salt
• 2 sticks salted butter, room temperature
• 1 3/4 cups sugar
• 2 large eggs
• 2 teaspoons vanilla extract
• 1 1/2 cups white chocolate chips
• 24 marshmallows, halved crosswise