Homemade Oat Milk: Creamy, Not Slimy, 30-Second Blend

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Last updated on October 12th, 2026

Most oat milk you make at home turns out either slimy or watery, and the difference comes down to one thing: temperature. Keep everything cold and blend for no more than thirty seconds, and you get a smooth, genuinely creamy oat milk for a fraction of what the carton costs in the shop, dairy-free, nut-free and endlessly customisable. If you enjoy making dairy staples from scratch, my homemade ricotta recipe is just as simple.

Homemade oat milk being poured into a bottle

How to Make Oat Milk That’s Smooth, Not Slimy

Oat milk is nothing more than oats and water. The trick is what happens while it’s blending. As the blades spin, friction warms the liquid, and warm liquid starts to cook the oats, which is exactly what turns oat milk slimy rather than smooth. Keeping everything cold stops that from happening: use 750g of water and 250g of ice, or 1 litre of chilled water if that’s easier, blitzed with 90g of oats on high for no more than thirty seconds. Any longer and you’re back to cooking the oats. Beyond the texture, it’s naturally free from animal products, soya and nuts, so it works well for a lactose or dairy intolerance, and it’s a fraction of the cost of the shop-bought version while being fresher and completely customisable. It works in baking too, including as a swap for the milk in my Greek pita bread dough. Its creamy texture and mild flavour make it a straight swap for dairy in coffee, tea, smoothies, cereal, porridge and baking. It even works in savoury dishes, stirred into my creamy spinach and potato soup in place of cream.

Homemade oat milk being blended in a blender

Straining Oat Milk Without the Grit

Use ice and water or very cold water, as long as your total water content equals 1 litre for this amount of oats. The idea is the liquid never heats up when blending, which can result in the slimy texture that oat milk sometimes has. This is because the oats start to cook a little with the heat from the blender.
Let the oat milk drip through the nut milk bag, cheesecloth or tea towel with little or no force. This can make your oat milk grainy which will split in tea or coffee, for example. If you’re using cheesecloth or a tea towel and the milk still comes out grainy, try straining through the cloth a few times to filter out more bits of oat.

How Long Does Homemade Oat Milk Last?

Pour it into a bottle and keep it in the fridge, where it will last up to five days. It is far better than anything you can buy in the shop, and it even gives the right colour in a cup of coffee.

Why is my oat milk slimy?

This happens when the liquid heats up while blending, which causes the oats to start cooking. Using very cold water, or a mix of ice and water, keeps the liquid cold throughout blending and prevents this.

How much water should I use for this recipe?

Use a total of 1 litre of liquid for this amount of oats: either 750g of water and 250g of ice, or 1 litre of chilled water. Both give the same result.

Why is my oat milk grainy, and how do I fix it?

Let the milk drip through your nut milk bag, cheesecloth, or tea towel with little to no force. If it still comes out grainy, strain it through the cloth a few more times to filter out the remaining bits of oat.

Is oat milk suitable for people with allergies?

Yes, this oat milk is free from animal products, soya, and all types of nuts, making it a great option for anyone with a lactose or dairy intolerance.

How can I use homemade oat milk?

Its creamy texture and mild flavour make it a great dairy replacement in coffee, tea, smoothies, cereal, porridge, and all types of baking.