Never miss a bite! Sign up here to receive new recipes and reviews straight to your inbox. Celebrate National Oatmeal Day with these Blackberry Oatmeal Cookie Crumble Bars, the perfect combination of a chewy oatmeal cookie and tart blackberry filling. Today is National Oatmeal Day and I’m celebrating with Driscoll’s! Berries and oats are a perfect pair. Most bowls of oatmeal…