You can buy unflavored whey protein powder in many grocery stores and pharmacies. It is easily added and will dissolve in any liquid. How about making a milkshake and adding it to that?
Chocolate peanut butter milk shake recipe (I dont measure so everything below is an approximate amount)
3 or 4 cups chocolate ice cream (regular not low fat)
2 cups of whole milk
2 tablespoons of peanut butter (smooth)
1 scoop whey protein powder
1 scoop carnation instant breakfast powder
2 tablespoons chocolate syrup
Blend this for a couple minutes until it is very smooth and creamy. Top with whipped cream. Each shake has about
2000 calories.
I suggest not to disclose how many calories are in the shake to your husband. That way he will continue to try to take in more every day. If you can get him to drink just one shake per day thats half the battle right there. Try to encourage him to eat healthy with everything else.
Here is a list of easy to eat foods that should make it a little easier for him.
Easy to Eat Foods List