1-Getting started with Krolls Kookies is straightforward and fun: beginning with preheating your oven to 400°F. In a large bowl, whisk together the All-Purpose flour, cake flour, baking soda, baking powder, corn starch, and salt until well combined. This sets the base for your dough and ensures even mixing.

2-Next, place the cubed cold butter in the bowl of a stand mixer with a paddle attachment and cream it for 30 seconds. Add the brown sugar and mix for another 30 seconds, then incorporate the white granulated sugar and cream until the mixture is light and fluffy. Follow this by adding the whole egg and egg yolk, plus the vanilla extract if you’re using it, and blend until everything is mixed smoothly.

3-Gradually add the flour mixture on low speed until just incorporated, avoiding over-mixing to keep the texture soft. Mix in the chocolate chips until they’re evenly distributed throughout the dough. Scoop out roughly six cookies, each weighing about 5.7 ounces, and keep them tall without flattening. Place them on a cookie sheet lined with a silicone mat or parchment paper, then bake for 10 to 12 minutes until the tops are golden brown, pulling them out just before they’re fully done for that gooey center. Let the cookies rest on the sheet for 15 to 30 minutes before moving them to a cooling rack to cool completely, and enjoy with a glass of milk for the ultimate treat.