1. Prepare the required materials
2. Put the butter, powdered sugar, salt and powdered milk in a clean basin and stir with a whisk.
3. Beat the butter until it turns white to milky white, then add the egg mixture and mix well.
4. Add whole wheat flour and stir well
5. Then add the oatmeal and stir evenly. Be careful not to pour in all the oatmeal, leave a small amount for later.
6. Knead the oatmeal biscuits into a rectangular shape, and roll on the remaining oatmeal.
7. Wrap it with plastic wrap, put it in the refrigerator and freeze it until hard (approximately more than 2 hours).
8. Take out the oatmeal biscuits in the refrigerator and cut them into 0.5cm thick one with a knife.
9. Put it on the baking tray and arrange it.
10. Bake in the oven, the upper tube is 180 degrees, and the lower tube is 150 degrees, for 20 minutes.
Tips:It must be fully refrigerated before baking. It is best to use an oven that can independently control the temperature up and down. I use Dongling’s DL-K33E oven.
