Preheat the oven to 350°F and line two baking sheets with parchment paper and set aside.
In a medium bowl, whisk together 1¾ cups all-purpose flour, ½ cup Dutch cocoa powder, 1 (3.4oz.) box instant chocolate fudge pudding mix, 1 tablespoon malted milk powder, ½ teaspoon espresso powder, ¾ teaspoon sea salt, and ¾ teaspoon baking soda. Set aside.
Cream together ½ cup salted butter, ¾ cup light brown sugar , and ¼ cup granulated sugar in a large bowl or stand mixer fitted with a paddle attachment and cream for 2 minutes.
Add in 1 large egg and 1½ teaspoons pure vanilla extract and beat until fully incorporated.
Add the dry ingredients and 3 ounces Irish Cream liqueur, alternating between them 3 times, beginning with flour and ending with milk (mix on low so the dry ingredients don't go everywhere). Mix for about 1 to 2 minutes - the dough should be thick but soft and greasy but not sticky.
Fold in 1 cup mini chocolate chips just until incorporated.
Use a #24 cookie scoop to measure the dough into balls about 2 ounces each.
Place the cookie dough balls on the prepared baking pan at least 2 inches apart and gently press the dough down to flatten slightly.
Bake for 8 to 10 minutes until the edges are just set and the dough looks more matte than glossy.
Allow the cookies to cool on the pan for 15 minutes before transferring them to a wire rack with a spatula to cool completely. Bake the other pan of cookies. These cookies are very soft right after baking and will firm up while they cool.