Oat Milk vs Rice Milk: Which Is More Nutritious? A Complete Plant Milk Comparison

Plant-based milk has taken over supermarket shelves, and two of the most popular options are oat milk and rice milk. Both are dairy-free, vegan, and widely available, but they differ significantly in nutrition, taste, and how they perform in coffee. If you're wondering which one deserves a spot in your fridge, you've come to the right place.

In this article, we break down the key differences between oat milk and rice milk — from calories and sugar to environmental impact and frothing ability. We'll also share our top picks from Grind Coffee so you can try the best oat milk for your morning brew.

Nutritional Breakdown: Oat Milk vs Rice Milk

Oat milk is made by soaking and blending oats with water, then straining out the solids. It naturally contains beta-glucan, a type of soluble fibre that can help lower cholesterol and support heart health. A typical 240ml serving of unsweetened oat milk provides around 120 calories, 3g of protein, 5g of fat, and 16g of carbohydrates (including 7g of sugar if unflavoured). Many brands also fortify oat milk with calcium, vitamin D, and B12.

Rice milk, on the other hand, is produced from milled rice and water. It tends to be thinner and sweeter because the natural starches break down into sugars. A serving of unsweetened rice milk contains about 120 calories, less than 1g of protein, 2g of fat, and 26g of carbohydrates (with about 12g of sugar). It is often fortified with calcium and vitamin D, but it lacks the fibre and protein found in oat milk. For a creamier, more nutritious option, oat milk is the clear winner.

• Oat milk: 120 calories, 3g protein, 5g fat, 16g carbs, 7g sugar (unsweetened)
• Rice milk: 120 calories, <1g protein, 2g fat, 26g carbs, 12g sugar (unsweetened)
• Oat milk provides beta-glucan fibre; rice milk has almost no fibre

Taste and Texture in Coffee

When it comes to coffee, texture matters. Oat milk is famous for its creamy, velvety consistency that closely mimics whole milk. It froths beautifully, making it a barista favourite for lattes, cappuccinos, and flat whites. The subtle sweetness of oat milk complements coffee without overpowering it, and it doesn't separate or curdle when heated. Our Barista Oat Milk (6-pack) is specifically formulated for steaming and pouring, giving you café-quality results at home.

Rice milk is much thinner and watery in texture. It doesn't froth well and can leave a grainy mouthfeel. When added to hot coffee, rice milk tends to separate and may create an unpleasant watery layer. Its high sugar content can also make coffee taste overly sweet. While rice milk is fine for cereal or smoothies, it's not ideal for coffee lovers who crave a rich, creamy cup.

• Oat milk: creamy, froths well, barista-friendly
• Rice milk: thin, doesn't froth, can separate in hot coffee

Environmental Impact and Sustainability

Both oat milk and rice milk have a lower environmental footprint than dairy milk, but they differ in water usage and land impact. Oats require significantly less water to grow than rice. According to life-cycle assessments, oat milk production uses about 48 litres of water per litre of milk, whereas rice milk uses around 270 litres per litre — that's more than five times as much. Rice cultivation also emits more methane due to flooded paddy fields.

Oats are often grown in cooler climates with less need for irrigation, making oat milk a more sustainable choice overall. If you're looking to reduce your carbon footprint, oat milk is the eco-friendlier option. Plus, many oat milk brands (including Grind) use responsibly sourced oats and recyclable packaging. For a delicious and planet-friendly choice, try our Unsweetened Original Oat Milk (6-pack) for everyday use.

• Oat milk: 48 litres of water per litre of milk
• Rice milk: 270 litres of water per litre of milk
• Oat milk produces fewer greenhouse gases than rice milk

Which One Is Better for Kids and Families?

For families, nutrition and taste are top priorities. Oat milk provides more protein and fibre, which help keep kids full and support digestion. It also has a naturally sweet, mild flavour that most children enjoy. Many parents choose oat milk as a dairy-free alternative for cereal, baking, or drinking straight. Our Kids Oat Milk (6-pack) is specially formulated with added vitamins and a kid-friendly taste, making it a nutritious choice for little ones.

Rice milk, while safe for most children, is lower in protein and higher in sugar. It's also not recommended as a primary milk for infants or toddlers because it lacks essential nutrients. However, rice milk can be a good option for children with multiple food allergies (e.g., dairy, soy, nuts). If you're looking for a balanced, everyday plant milk for the whole family, oat milk is the better pick.

• Oat milk: higher protein, fibre, and vitamins
• Rice milk: lower protein, higher sugar, okay for allergy-prone kids

How to Choose: Oat Milk vs Rice Milk

Still not sure which one to buy? Here's a quick decision guide. Choose oat milk if you want a creamy, frothable milk for coffee, a higher protein and fibre content, and a more sustainable option. It's perfect for lattes, baking, and everyday drinking. Rice milk is better if you need a very hypoallergenic milk (no oats, soy, nuts, or gluten), prefer a thinner consistency for cereal, or have a gluten intolerance (though certified gluten-free oat milk is also available).

For most people, oat milk is the superior all-rounder. It tastes great, works in hot and cold drinks, and offers real nutritional benefits. At Grind Coffee, we've crafted a range of oat milks to suit every need — from barista blends to kid-friendly options. Explore our full collection of oat milk to find your new favourite.

• Oat milk: creamy, nutritious, sustainable, great for coffee
• Rice milk: thin, low allergen, good for cereal

Whether you're a coffee connoisseur or a parent seeking a healthier dairy-free milk, oat milk is the clear winner over rice milk for nutrition, taste, and versatility. Try our Barista Oat Milk (6-pack) for the perfect latte at home, or grab a pack of Kids Oat Milk (6-pack) for the little ones. Your taste buds — and the planet — will thank you.