You can use lactose-free milk in baking and cooking as a one-to-one substitute for regular milk, preferably matching the fat content.
Essential Concepts
Expect slightly more sweetness; lactose-free milk is still dairy and is not safe for people with a milk allergy.
Related reading: https://www.niddk.nih.gov/health-information/digestive-diseases/lactose-intolerance/eating-diet-nutrition
