Healthy Strawberry Oatmeal Bars (Low Calorie, High Fibre)

If you have been searching for a genuinely wholesome snack that still feels like a treat, these healthy strawberry oatmeal bars might just become your new favourite bake. Each bar comes in at around 118 calories, making them one of the most satisfying low calorie options you can pull out of the oven. They are chewy, jammy, golden at the edges and completely free from refined sugar. Busy parents, meal-prep lovers and anyone trying to eat a little cleaner without giving up dessert will find this recipe slides easily into their routine.
The base and crumble topping are built on a foundation of rolled oats, which bring slow-release carbohydrates and a good dose of soluble fibre called beta-glucan. That fibre helps keep blood sugar steady after eating, which is exactly what you want from a snack. Almond flour is stirred in alongside the oats to add healthy fats, a subtle nuttiness and a slightly tender crumb. The whole mixture is bound with coconut oil and sweetened with just two tablespoons of pure maple syrup and a ripe mashed banana, both of which add natural sweetness without spiking the sugar content the way refined white sugar does. The strawberry filling is simply fresh strawberries cooked down with a squeeze of lemon juice and a teaspoon of chia seeds. Those tiny chia seeds thicken the fruit naturally as it cools, so there is no need for cornflour or added sugar in the filling at all.
Texture-wise, these bars offer the best of both worlds. The base presses down firm and holds its shape when sliced, while the crumble topping stays slightly crunchy and toasty. In between, the strawberry layer is soft, jammy and bright with a gentle tartness from the lemon. Straight from the fridge they are satisfyingly dense and cold, which makes them brilliant for a summer afternoon snack. At room temperature they soften slightly and the oat layers become more chewy and comforting, ideal alongside a cup of tea. Cut them into 12 bars for a smaller snack portion or 9 larger squares if you want something more substantial after a workout.
From a nutritional standpoint, these bars tick a lot of boxes without making any flavour sacrifices. Each serving provides around 3 grams of fibre and 3 grams of protein, which is notably higher than most shop-bought cereal bars of a similar size. The recipe is naturally dairy free and egg free, so it suits a wide range of dietary needs without requiring any awkward swaps. Using gluten-free certified oats makes the whole recipe suitable for those avoiding gluten too. The total sugar per bar sits at roughly 6 grams, which is well below the 12 to 15 grams you would typically find in a conventional strawberry oat bar recipe. Strawberries themselves are one of the lowest-sugar fruits available and come loaded with vitamin C, manganese and antioxidant compounds that support skin health and reduce inflammation. This is the kind of recipe that genuinely earns the word healthy, not just a traditional recipe with the butter swapped for something else.
Ingredients
- 2 cups rolled oats (use certified gluten-free oats if needed)
- 0.5 cup almond flour (blanched almond flour works best)
- 0.3 teaspoon fine sea salt
- 0.5 teaspoon ground cinnamon
- 0.3 teaspoon baking powder
- 1 medium ripe banana (mashed, about 85g)
- 3 tablespoons coconut oil (melted and slightly cooled)
- 2 tablespoons pure maple syrup
- 1 teaspoon vanilla extract
- 300 g fresh strawberries (hulled and roughly chopped, about 2 cups)
- 1 tablespoon fresh lemon juice
- 1 teaspoon chia seeds (helps thicken the filling naturally)
- 1 teaspoon lemon zest (optional but adds brightness)
Instructions
- 1
Preheat your oven to 175 degrees Celsius (350 degrees Fahrenheit). Line an 8x8 inch square baking pan with parchment paper, leaving some overhang on two sides so the bars lift out easily later.
Greasing the pan lightly before laying the parchment helps it stay flat.
- 2
Make the strawberry filling first so it has time to thicken. Add the chopped strawberries, lemon juice and lemon zest to a small saucepan over medium heat. Cook for about 8 to 10 minutes, stirring occasionally, until the strawberries have broken down and most of the liquid has reduced. Stir in the chia seeds, then remove from heat and set aside to cool slightly.
The filling should look quite thick and jammy. If it still looks watery after 10 minutes, cook for another 2 to 3 minutes.
- 3
In a large mixing bowl, combine the rolled oats, almond flour, sea salt, cinnamon and baking powder. Stir to distribute everything evenly.
- 4
Add the mashed banana, melted coconut oil, maple syrup and vanilla extract to the dry ingredients. Stir well until a clumpy, slightly sticky dough forms. It should hold together when you press a small amount between your fingers.
If the mixture feels too dry, add half a tablespoon of coconut oil. If it feels too wet, add a tablespoon more of oats.
- 5
Transfer roughly two thirds of the oat mixture into the lined pan. Use your fingers or the flat base of a glass to press it down firmly and evenly into a compact layer across the bottom of the pan.
Pressing the base firmly is the key to bars that slice cleanly without crumbling.
- 6
Spoon the strawberry filling evenly over the pressed oat base, spreading it gently to the edges with the back of a spoon.
- 7
Crumble the remaining oat mixture over the top of the strawberry layer, distributing it as evenly as possible. Press it down very gently so it makes light contact with the filling without sinking in.
Leaving some texture in the topping gives you a better crumble finish once baked.
- 8
Bake for 25 to 28 minutes until the top is golden and the edges are just turning a deeper brown. The centre may look slightly soft but will firm up as it cools.
- 9
Remove from the oven and allow the bars to cool completely in the pan. Then transfer to the fridge for at least 20 minutes before lifting out and slicing into 12 bars.
Chilling makes slicing much cleaner. A sharp knife wiped between cuts keeps the edges neat.
Nutrition per serving
118kcal
Calories
3g
Protein
15g
Carbs
5g
Fat
3g
Fibre
6g
Sugar
52mg
Sodium
Pro Tips
- ✓
Frozen strawberries work well too. Thaw them first and drain off any excess liquid before cooking the filling.
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Make sure your banana is very ripe with brown spots for maximum natural sweetness.
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Do not skip the cooling and chilling step. Warm bars will fall apart when sliced.
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Use old-fashioned rolled oats rather than quick oats for the best chewy texture.
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For a slightly crispier topping, place the pan under the grill for the final 2 minutes of baking, watching closely so it does not burn.
Frequently Asked Questions
Variations
- •
Mixed Berry Oatmeal Bars
Replace half the strawberries with fresh raspberries or blueberries for a mixed berry filling. The tartness of raspberries pairs beautifully with the sweet oat base.
- •
Strawberry Coconut Bars
Stir 3 tablespoons of unsweetened desiccated coconut into the oat mixture for a tropical twist. The coconut toasts beautifully in the oven and adds extra flavour depth.
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Chocolate Drizzle Bars
Once the bars are fully cooled, drizzle melted dark chocolate (85% cocoa or higher) over the top for a more indulgent finish that still keeps the sugar content reasonable.
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Seed Boost Bars
Add 2 tablespoons of pumpkin seeds and 1 tablespoon of sunflower seeds to the oat mixture for extra crunch and a boost of minerals including zinc and magnesium.
Substitutions
- •Almond flour → Oat flour (Grind rolled oats in a blender to make oat flour. Use the same quantity. This makes the bars nut-free.)
- •Coconut oil → Light olive oil or avocado oil (Use the same quantity. The bars will have a slightly less rich flavour but will still hold together well.)
- •Maple syrup → Raw honey (Use the same amount. Honey adds a slightly floral sweetness. Note this makes the recipe non-vegan.)
- •Fresh strawberries → Frozen strawberries (Thaw and drain thoroughly before cooking. May need a few extra minutes on the hob to reduce.)
- •Ripe banana → Unsweetened applesauce (Use 60g (about 4 tablespoons) of applesauce in place of the mashed banana. The flavour will be more neutral.)
🧊 Storage
Store the bars in a single layer in an airtight container in the fridge for up to 5 days. Place a sheet of parchment between layers if stacking. For longer storage, wrap individual bars in parchment and freeze in a zip-lock bag for up to 2 months. Thaw overnight in the fridge or at room temperature for about 30 minutes before eating.
📅 Make Ahead
These bars are ideal for making ahead. The strawberry filling can be cooked up to 2 days in advance and stored in the fridge. The full baked bars also taste even better on day two once the flavours have had time to settle and the oats have softened slightly into the filling.


