Chocolate Stout Ice Cream Sandwich Recipe

Name: Chocolate Stout Ice Cream Sandwich Recipe
Ingredients: 1 1/4 cups whole milk; 1 1/4 cups heavy cream; 1 teaspoon vanilla extract; 1/4 teaspoon fine sea salt; 1/4 cup unsweetened cocoa powder, sifted; 1/2 cup granulated sugar; 1/4 cup packed light brown sugar; 4 large egg yolks; 4 ounces semisweet chocolate, chopped; 3/4 cup stout beer; 2 cups all-purpose flour; 1/4 cup unsweetened cocoa powder; 1 teaspoon baking powder; 1/2 teaspoon baking soda; 4 ounces (1 stick) unsalted butter, at room temperature; 1/2 cup packed light brown sugar; 1/3 cup granulated sugar; 1 large egg; 3/4 cup stout beer, divided; crushed pretzels (about 1/2 cup), for rolling