Plant-Based Milks: A Guide to Navigating Soy, Oat, and Coconut
Until a few years ago, the choice was simple: whole or semi-skimmed milk. But then came plant-based drinks.
Today, walking into a supermarket, we’re faced with a “white jungle” of cartons: soy, almond, oat, coconut, rice… and the list grows longer every day.
But be warned: calling them “milk” is not just a legal error, but a technical one too. In the kitchen, these drinks are not interchangeable.
If you’ve tried making a béchamel sauce with rice milk and ended up with a greyish paste, or if your almond-based custard remained too runny, you know what I mean.
To avoid confusion, we need to look beyond the packaging and understand the chemical structure of these drinks: protein and fat.
The Technical Pillar: Protein vs. Fat
In cooking, dairy milk works because it’s a perfect emulsion of fat and protein.
Just as we saw when studying the structure of flour or the versatility of eggs, each ingredient has a structure that determines the final result. When we heat or whisk a plant-based drink, we are asking different molecules to do the same job as casein and animal fats.
According to an in-depth analysis by Humanitas, soy milk is the only one, from a nutritional and structural perspective, that can truly compete with dairy milk, thanks to its high protein content.
1. Soy: The Official “Understudy”
It’s the queen of technical substitutions.
- Why it works: It’s very rich in plant-based protein and contains lecithin (a natural emulsifier).
- In the kitchen: It’s the ideal choice for savoury sauces (béchamel). If you want to achieve a perfect consistency, remember the importance of starches: soy reacts very well with cornstarch or flour, creating stable bonds.
2. Oat: The Creaminess Magician
Oat doesn’t win on protein, but on its complex carbohydrates.
- Why it works: When cooked, it tends to “gel” slightly, giving a fuller mouthfeel.
- In the kitchen: Unbeatable for breakfast pastries. Remember, however, that oat is naturally savoury: when using it, use salt sparingly to avoid altering the dish’s flavour balance.
3. Almond: The Aromatic Accent
Here we enter the world of healthy fats, but with very little protein.
- Why it works: It has a strong aromatic component that lingers after cooking.
- In the kitchen: Perfect for custard creams, where the nut flavour complements vanilla. Be careful, though: being low in protein, the final structure will depend entirely on the thickeners you add.
The Straporito Table: Which to Choose?
| Drink | Protein | Best Use in Cooking | The Straporito Tip |
| Soy | High | Béchamel, Mayonnaise | Use 1:1 in place of dairy milk |
| Oat | Medium | Cappuccino, Pancakes | Reduce sugar in the original recipe |
| Almond | Low | Custard, Biscuits | Pair with a hint of lemon zest |
| Rice | Almost none | Sorbets, light desserts | Do not use for sauces that need to thicken |
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Final Advice
When buying a plant-based drink, just like with water, purity is key.
Read the labels: avoid products with added sugar for your savoury preparations. Cooking is chemistry, but it’s also about respecting the raw ingredients.
Cooking with plant-based alternatives isn’t a sacrifice, but a way to discover new nuances. You just need to know which molecule you’re putting in the pan.
