Note: I made dry mixes to take on a road trip and then added plant milk and berries. This is barely sweet, add more sweetener, berries or add-ins to taste!
Also, you can switch up the liquid according to what’s available. You can use plant milk that is ready to go–I like soy milk because it has a higher protein content and is more filling (and all that bad stuff you’ve heard about soy is NOT TRUE!). But another inexpensive option I often use is to blend up water with almond or peanut butter (or sun butter for nut free is good as well!).
Again, this will give you more protein and fat than straight almond milk which is a good thing when you are feeding a house full of boys. It’s also a nice way to really combine the sweetener, as honey and maple syrup can be a little difficult to combine. But when needed I’ve just used a vanilla, sweetened milk to add a little more flavor to the mix. Just do what works best for you!