Mix instant oats, whole wheat flour, baking powder, cinnamon, and salt in a medium sized bowl. Measuring the oats and flour by grams is important. If you don't have a scale, sift ingredients to measure.
In separate large bowl, mix together butter, egg, and vanilla. Then slowly add maple syrup and milk and stir until combined.
Slowly add the flour and oat mixture to the wet mixture and stir until just incorporated. Gently fold in the blueberries.
Cover and chill dough in fridge for at least 30 minutes.
Pre-heat oven to 325 degrees. Line a baking sheet with parchment paper.
Place 12 - 15 rounds on parchment paper and flatten. Bake for 10-14 minutes. Cool on a wire rack for 10 minutes and then enjoy!
Notes
Make your own instant oats by pulsing old fashioned rolled oats in a food processor and pulsing a few times. It's best to measure your oats and flour with a kitchen scale for best results. See our favorite below!