In a medium bowl, whisk together the 2¼ cups all-purpose flour, 2 tablespoons malted milk powder, 1 tablespoon corn starch, and ½ teaspoon baking soda.
In the bowl of a stand mixer fitted with a paddle attachment, cream together 1 cup light brown sugar, ¾ cup salted butter (melted), ½ cup granulated sugar, 1 tablespoon vanilla bean paste, and 1 teaspoon salt until smooth. 1 min on 2 and 1 min on 4 speed.
Add in 1 large egg and 1 additional large egg yolk and beat until light and creamy. About 5 minutes.
Add the dry ingredients to the wet ingredients a little at a time, mixing between each addition.
Fold in most of the 2 cups chocolate chips.
Measure the dough into 1/4 cup-sized balls, or about 3 ounces each. I use a #16 cookie scoop. If desired, press additional chocolate chips into the top of the dough.
Chill uncovered in the fridge for 2 hours.
Preheat oven to 325°F and place balls on a parchment-lined cookie sheet at least 3 inches apart. Bake for 15 to 17 minutes until the edges are golden brown. Let the cookies cool on the pan.