Step 1

Preheat oven to 350 degrees. Line rimmed 18 by 13-inch baking sheets with parchment paper or silicone baking mats.

Step 2

In a mixing bowl whisk together flour, cinnamon, baking soda, baking powder and salt for 20 seconds, set aside.

Step 3

In the bowl of an electric stand mixer fitted with the paddle attachment cream together butter, brown sugar, and granulated sugar until combined.

Step 4

Mix in one egg, then blend in second egg and vanilla.

Step 5

Add flour mixture and mix just until combined then mix in oats, raisins and walnuts.

Step 6

Scoop dough out and shape into 1 1/2-inch balls (or 40 grams each), transfer to prepared baking sheet fitting 12 per sheet and spacing 2-inches apart.

Step 7

Bake in preheated oven until golden brown on edges and nearly set (center should look under-baked), about 12 - 14 minutes.

Step 8

Let cool on baking sheet for a few minutes then transfer to a wire rack to cool completely. Repeat with remaining dough.

Step 9

Store in an airtight container at room temperature.