Digestive Biscuits (from Nigella Lawson)

Digestive Biscuits
1/2 cup oats
1 1/2 cuts spelt flour
1/2 tsp. salt
1 tsp. baking powder
2 tsp demerara sugar
1/4 cup white regular shortening cold and cut in 1/2-inch dice
2 tbsp. unsalted butter also cold and diced
1/3 cup milk
Put oats in blender to make finer. Put first 5 ingredients together and mix. Rub in shortening and then butter. Add cold milk by the tablespoon until you have a firm dough. Cut, bake on parchment 10-15 minutes at 400 F.