In a large bowl, whisk the spelt flour, baking powder, baking soda, cornstarch, and salt together. Set aside.
2¼ cups (330 g) spelt flour, 1½ tsp baking powder, 1 tsp baking soda, 1 tsp cornstarch, ½ tsp salt
Using the paddle attachment on a stand mixer, beat the cooled browned butter, maple syrup, eggs, and vanilla together on medium low until light in color, about 2 minutes.
1 cup (226 g) butter, browned and cooled, 1 cup (300 g) pure maple syrup, 2 whole eggs, 2 tsp vanilla
Turn off the mixer. Add in the dry ingredients and mix on low until just combined. The dough will be very sticky!
Pour in the chocolate chips and mix until distributed throughout.
2 cups chocolate chips
Cover the dough and let chill in the fridge for at least 2 hours, but preferably overnight. This gives the spelt flour time to absorb all the moisture and makes the dough less sticky and easier to work with.
Place an oven rack in the center position. Heat oven to 350° F.
Form dough into balls that are about 40 grams each.
Place 3 inches apart on a lined cookie sheet. Bake for 12 minutes on the middle rack, rotating halfway through bking.
Let cool on the cookie sheet for 10 minutes before transferring to a cooling rack to cool completely. Repeat baking process until all the dough has been used.