Stuffing

So I'm starting my weight gain shakes again. I have 2 questions about cake mixes.

1.) Let's say my initial ingredients of weight gain shakes was: Heavy Cream, vanilla milk, banana(s), added butter, added cinnamon
(For taste); do I just add vanilla cake mix into the shake?

2.) how much do you actually put to make it effective?

3.) if I'm doing something wrong here what should I substitute the ingredients with.

Thank you for your time. I always wanted to incorporate cake mix. Previously my weight gain shakes helped me gain 25 lbs. I pushed towards 155lbs (heaviest weight, and I never EVER BROKE ABOVE 150 MARK, So I'm aiming towards the 160's, which is my Obesity BMI marker.

One way of doing it could be grazing a candy mixture of different flavors between meals. Combine salty, sour, sweet and you will not get tired of the taste. Eat a large meal 2 hours before bed, and just before bed, drink a milkshake, made of in general 50% energy coming from fats and 50% from carbs. For a 2 cups size use:
• Whole Milk (3%): 1 cup minus 1 tbsp
• Liquid Soft Serve ice cream Mix : ⅓ cup + 1 tbsp
• 40% Heavy Cream : ⅓ cup
• Glucose Syrup: 2 ½ tbsp
• Performance Maltodextrin / Rice Starch (Sports-maltodextrine): 4 tbsp (ca ¼ cup).
Add flavor of your liking.
This will help the gaining and make you more hungry at breakfast. Good luck!

thank you so much! What is the total amount of calories presented here?

It is approximately 820 kcal for approximately the 2 cups. The volume varies depending on if you stir or mix but 2 cups more or less. The malto is super, but is kind of sticky, just for information. Try drinking half the amount at first and adjust the recipe while you go on. When you think it's ok, then you can prepare more in the fridge. Please let me know what you think.

Here is the recipie in SI units:

Standard milk (3% fett): 2 ¼ dl
Ice cream: 1 dl
Heavy cream (40% fat): 0,8 dl
Glycos syrup: 2 ½ tablespoons
Sport-maltodextrin 4 table spoons or rice starch or a combination.

Energy:3350 kJoule or just above 800 kcal