In the bowl of your stand mixer or food processor or mixing bowl, add the cubes of butter, both types of sugar, Greek yogurt, ginger, garam masala, turmeric, salt and cayenne pepper. Blend thoroughly, about 5 minutes.
1.5 sticks unsalted butter, 3 tbsp icing sugar, 3 tbsp granulated sugar, 2 tbsp 4% Greek yogurt, 1 tsp ground ginger, 1 tsp Garam Masala, 1/2 tsp turmeric, 1/4 tsp salt
In a mixing bowl, combine the flour, oat fiber and cornstarch.
1/4 tsp cayenne pepper, 1 cup semolina flour, 1/4 cup oat fiber
With the stand mixer, hand mixer or food processor still going, add the flour mixture 1/4 cup at time until everything is thoroughly blended.
In your baking tin, add the dough in an even layer. With a fork, poke holes evenly throughout.
Preheat your air fryer to 300F.
Once preheated, put in the air fryer. Air fry at 300F for 25-35 minutes, until the edges begin to separate from the sides of the tin.
When done, remove from the air fryer. Cut into 24 pieces.
Remove the cookies from the tin and place them on a cooling rack.