To “cut in” generally means that you will “cut” some sort of fat, generally shortening or butter, into your dry ingredients (i.e. flour, sugar, baking soda/powder, etc). You can use a couple of methods to “cut in” these ingredients:
– Pastry Blender – A Pastry Blender, as shown here, works great to cut the solid into your dry ingredients. Just use the blender to literally “chop” the food up to crumbly consistency.
– 2 Knives – Cut solids into dry ingredients using 2 knives – simply cross the knives in opposite directions until you’ve “cut” all the solid up