Anna Louise There is a particular satisfaction that comes from making a biscuit that uses ingredients you always have in your kitchen, comes together in minutes, and tastes genuinely wonderful. Mary Berry’s oat biscuits tick every one of those boxes.
These are not the thin, cardboard-like oat biscuits you might find in a supermarket multipacks. These are properly made — crisp and golden, with a lovely nutty, slightly caramelised flavour from the oats, and a texture that is sturdy enough to hold up to cheese or jam but delicate enough to crumble pleasantly when you bite in. They are one of the most versatile biscuits in British baking and one of the most underrated.
They are wonderful with a strong cheddar and a glass of wine. They are brilliant with a bowl of soup. They are excellent with butter and honey at breakfast. And they are, perhaps most importantly, extremely good eaten plain, still slightly warm from the oven, standing at the kitchen counter.
What Makes These Oat Biscuits Work So Well?
The combination of rolled oats and plain flour gives these biscuits their distinctive character — the oats provide nuttiness and texture, the flour provides structure. The balance between the two determines whether the finished biscuit is crisp and light or heavy and dense.
Golden syrup is the binding ingredient here, and it does double duty — it holds the dough together and gives the biscuits their characteristic slightly caramelised, golden sweetness. Do not substitute it with honey or maple syrup — golden syrup has a specific flavour and consistency that makes these biscuits what they are.
Ingredients for Mary Berry Oat Biscuits
- 150g rolled oats (not instant porridge oats — use proper rolled oats)
- 100g plain flour, sifted
- 100g unsalted butter
- 75g caster sugar
- 2 tbsp golden syrup
- 1 tbsp whole milk
- ½ tsp bicarbonate of soda
- ½ tsp ground cinnamon
- Pinch of salt
How to Make Mary Berry Oat Biscuits — Step by Step
Step 1 — Preheat and Prepare
Preheat your oven to 170°C / 150°C fan / Gas 3. Line two large baking trays with baking parchment. These biscuits spread during baking, so leave plenty of space — at least 5cm between each one.
Step 2 — Melt the Butter and Syrup
Place the butter, caster sugar, golden syrup, and milk in a small saucepan over a low heat. Stir gently until the butter has melted and the sugar has dissolved. Remove from the heat and leave to cool for two to three minutes — you do not want the mixture too hot when you add the bicarbonate of soda.
Step 3 — Add the Bicarbonate of Soda
Add the bicarbonate of soda to the warm butter mixture and stir immediately. It will foam up slightly — this is the reaction that gives these biscuits their lightness. Stir until the foam settles, about 30 seconds.
Step 4 — Combine With the Dry Ingredients
In a large mixing bowl, combine the rolled oats, sifted plain flour, cinnamon, and salt. Pour the warm butter mixture over the dry ingredients and stir with a wooden spoon until everything comes together into a soft, slightly sticky dough. Leave to stand for two minutes — the oats will absorb some of the moisture and the dough will firm up slightly.
Step 5 — Shape and Place
Roll the dough into balls roughly the size of a walnut — about 20g each — and place on the prepared trays, leaving 5cm between each one. Press each ball down gently with the back of a fork or the palm of your hand to flatten slightly to about 1cm thickness. They will spread further in the oven, so do not flatten them too much.
Step 6 — Bake
Bake on the middle shelf for 12 to 15 minutes until deep golden brown all over. Watch them carefully in the final few minutes — oat biscuits go from perfectly golden to over-browned very quickly because of the sugar content.
Leave on the trays to cool completely. This is important — oat biscuits are soft when they first come out of the oven and firm up and crisp as they cool. Do not attempt to move them while warm or they will crumble.
My Top Tips for Perfect Oat Biscuits
Use proper rolled oats, not instant porridge oats. Instant oats are much finer and pre-cooked, giving you a much softer, less interesting texture. Proper rolled oats have the right size and texture to give these biscuits their characteristic nuttiness and slight crunch.
Let the butter mixture cool slightly before adding the bicarbonate of soda. If the mixture is too hot when you add the bicarbonate, the reaction happens too quickly and you lose the leavening effect before it does its job in the oven. Two to three minutes of cooling is all you need.
Do not overbake. These biscuits look deceptively soft when they come out of the oven even when they are done — they firm up completely as they cool. Pull them out when they are a deep, even golden brown. If you wait until they look crisp in the oven, they will be overbaked and bitter when cool.
Leave them on the tray to cool. Moving warm oat biscuits breaks them. Leave them completely undisturbed on the baking tray until they are fully cool and have set firm. Once set, they are robust and keep well.
Add seeds or nuts for variation. A tablespoon of sesame seeds, sunflower seeds, or finely chopped walnuts stirred into the dough adds extra texture and flavour and makes these biscuits even more interesting. They still work perfectly with cheese or on their own.
Serving Suggestions
With a mature cheddar and a glass of red wine — this is the combination I make them for most often and it is outstanding. With good butter and a scraping of honey at breakfast. With soup instead of bread. As a snack with a cup of tea. They are one of the most genuinely useful biscuits in your repertoire.
How to Store Mary Berry Oat Biscuits
At room temperature: Store in an airtight tin for up to 10 days. They actually improve slightly after a day as the texture settles and the flavour deepens.
In the freezer: Freeze in an airtight container for up to 3 months. Defrost at room temperature for 30 minutes — they will be just as crisp as fresh.
Mary Berry Oat Biscuits
Ingredients
Method
- Preheat oven to 170°C / 150°C fan / Gas 3. Line two baking trays with parchment.
- Melt butter, caster sugar, golden syrup, and milk together in a small saucepan over a low heat, stirring until dissolved. Remove from heat and cool for 2–3 minutes.
- Add bicarbonate of soda to warm butter mixture. Stir — it will foam slightly. Stir until foam settles.
- Combine rolled oats, flour, cinnamon, and salt in a large bowl. Pour in butter mixture and stir until a soft dough forms. Leave to stand 2 minutes.
- Roll into walnut-sized balls (about 20g each). Place on trays 5cm apart. Press down gently to about 1cm thickness.
- Bake for 12–15 minutes until deep golden brown all over. Leave to cool completely on the tray — do not move while warm.
Notes
Frequently Asked Questions About Mary Berry Oat Biscuits
Why are my oat biscuits soft instead of crisp?
Either they needed longer in the oven, or they were moved before they had fully cooled and set on the tray. Oat biscuits are soft when warm and only become crisp as they cool completely. If they are still soft after cooling, put them back in a low oven (150°C) for 5 minutes to dry them out further.
Can I make these biscuits gluten-free?
Yes — substitute the plain flour with a good gluten-free plain flour blend and use certified gluten-free oats. The texture will be very similar and the flavour is just as good.
Can I add chocolate chips to oat biscuits?
Yes — 50g of chocolate chips stirred into the dough with the dry ingredients is very welcome. They make a wonderful snack biscuit and are particularly popular with children.
Why did my biscuits spread too much?
The butter mixture was too hot when combined with the dry ingredients, or the dough was too warm when it went into the oven. Make sure the butter mixture has cooled to warm — not hot — before combining, and do not skip the two-minute resting time after mixing.
Can I use honey or maple syrup instead of golden syrup?
You can, but the result will be different. Golden syrup has a specific flavour — slightly buttery, caramelised, distinctly British — that is central to the character of these biscuits. Honey gives a floral sweetness and maple syrup adds a different flavour entirely. Both will work technically but neither will give you the same result.
How do I make these oat biscuits more savoury?
Reduce the sugar to 50g, leave out the cinnamon, and add a pinch of flaky sea salt and 50g of finely grated mature cheddar to the dough. The result is a brilliantly savoury oat biscuit that is exceptional with cheese and chutney.
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