Prehat oven to 350F

In a bowl, whisk together the flour, cocoa powder, and baking soda. Blend well

Using an electric mixer, beat the butter and sugars until blended.

Add the eggs and vanilla, beat until incorporated.

Add the flour mixture and beat until just incorporated.

Fold in the oats and chocolate

Drop rounded tablespoons of dough onto parchment paper or silicone-lined (silpat) baking sheets about 1 inch apart.

Bake 1 sheet at a time until golden brown. about 8 to 10 minutes per batch

Transfer cookies to a rack to cool

serve