Lemon Oatmeal Crumble Bars
If you’re looking for a delightful treat that balances tangy flavors with a satisfying crunch, you’ve come to the right place! These Lemon Oatmeal Crumble Bars are my go-to dessert for all occasions. Whether it’s a busy weeknight or a family gathering, these bars never fail to impress. The creamy lemon filling paired with the buttery oatmeal crust will have everyone reaching for seconds!
What I love most about this recipe is how easy it is to whip up. Plus, they can be made ahead of time, making them perfect for meal prep or impromptu gatherings. Trust me, once you try these Lemon Oatmeal Crumble Bars, they’ll quickly become a favorite in your home too.
Why You’ll Love This Recipe
- Quick and Easy: With just 15 minutes of prep time, you can have these delicious bars in the oven in no time.
- Family-Friendly: Kids and adults alike will enjoy the sweet and tangy flavors packed into each bite.
- Make-Ahead Convenience: These bars store well in the fridge, so you can prepare them ahead of time for parties or snacks.
- Wholesome Ingredients: Made with simple ingredients that you can feel good about indulging in.
- Versatile Treat: Perfect as a dessert or an afternoon snack – they fit any occasion!

Ingredients You’ll Need
Let’s gather some simple, wholesome ingredients to create these scrumptious Lemon Oatmeal Crumble Bars! You probably have a lot of these items already in your pantry.
For the Crust and Topping
- 1 cup rolled oats
- 1 cup all-purpose flour
- 1/2 cup brown sugar
- 1/2 cup coconut oil (melted)
- 1/4 teaspoon salt
For the Lemon Filling
- 1 cup fresh lemon juice (about 4-6 lemons)
- 1 can (14 oz) sweetened condensed coconut milk
- 2 tablespoons cornstarch
- Zest of 2 lemons
Variations
This recipe is wonderfully flexible! Here are some fun variations you might want to try:
- Add a Berry Twist: Fold in fresh blueberries or raspberries into the lemon filling for an extra burst of flavor.
- Use Different Citrus: Substitute lime or orange juice for a unique take on the classic lemon flavor.
- Make it Gluten-Free: Swap out regular flour for gluten-free flour blends to accommodate dietary needs.
- Try Nutty Flavors: Add chopped nuts like almonds or walnuts into the crumble topping for added texture.
How to Make Lemon Oatmeal Crumble Bars
Step 1: Prepare the Crust
Start by preheating your oven to 350°F (175°C). While it heats up, combine the rolled oats, all-purpose flour, brown sugar, melted coconut oil, and salt in a mixing bowl. Mix until crumbly. This step is crucial as it forms the base and topping for our bars!
Step 2: Press and Bake
Next, press about two-thirds of this mixture into a greased baking dish. Bake in the preheated oven for about 10 minutes until lightly golden. This baking step ensures your crust has that delicious buttery flavor before we add our lemon filling.
Step 3: Make the Lemon Filling
While your crust bakes, whisk together the fresh lemon juice, sweetened condensed coconut milk, cornstarch, and lemon zest in another bowl. Mixing until smooth is key; this filling will become creamy and luscious as it cooks!
Step 4: Assemble Your Bars
Once your crust has baked, remove it from the oven and pour the lemon filling over it. Spread evenly using a spatula. Then sprinkle the remaining crumble mixture on top. This creates that irresistible crumble layer that makes these bars so special!
Step 5: Final Bake
Return your assembled dish to the oven and bake for another 28-30 minutes until set and golden brown on top. This final bake allows all those flavors to meld beautifully together.
Step 6: Cool and Enjoy
Let your Lemon Oatmeal Crumble Bars cool completely before slicing them into squares. Trust me; this waiting period is worth it! Once cooled, enjoy them chilled or at room temperature—the choice is yours!
Pro Tips for Making Lemon Oatmeal Crumble Bars
Making these Lemon Oatmeal Crumble Bars can be a breeze with a few handy tips!
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Use Fresh Lemons: Freshly squeezed lemon juice will give your bars a vibrant flavor that bottled lemon juice simply can’t match, enhancing the overall taste experience.
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Chill Before Cutting: Allowing the bars to cool completely before cutting helps them maintain their shape. A little patience goes a long way in achieving those perfect squares!
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Customize Your Sweetness: Feel free to adjust the sugar in the crumble topping according to your taste. This flexibility allows you to cater the sweetness to your liking and dietary needs.
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Store Properly: Keep any leftovers in an airtight container at room temperature for up to three days or refrigerate them for a week. This keeps them fresh and ready for snacking!
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Experiment with Flavors: Add a touch of zest from the lemon peel into the filling for an extra citrus punch or mix in some blueberries or raspberries for a fruity twist!
How to Serve Lemon Oatmeal Crumble Bars
These Lemon Oatmeal Crumble Bars are not only delicious but also visually appealing, making them perfect for gatherings or simple family desserts.
Garnishes
- Powdered Sugar: A light dusting of powdered sugar on top adds an elegant touch and balances the tartness of the lemon.
- Whipped Coconut Cream: For a creamy contrast, serve with whipped coconut cream. It’s dairy-free and complements the tangy filling beautifully.
Side Dishes
- Fresh Fruit Salad: A refreshing mix of seasonal fruits adds color and offers a light, healthy balance alongside the rich bars.
- Herbal Tea: Pair these bars with a warm cup of herbal tea like chamomile or mint. The soothing flavors enhance the dessert experience.
- Non-Dairy Ice Cream: For those who enjoy a cold treat, serve alongside non-dairy ice cream. The creamy texture pairs perfectly with the tangy lemon.
- Yogurt Parfait: Layer yogurt with granola and fresh berries for a delightful contrast that can be served as a side dish or even breakfast option!
Enjoy your Lemon Oatmeal Crumble Bars, and let each bite remind you of sunny days ahead!

Make Ahead and Storage
These Lemon Oatmeal Crumble Bars are perfect for meal prep, making them an excellent choice for busy weeks or special occasions. You can easily prepare them in advance and enjoy their delightful flavors throughout the week!
Storing Leftovers
- Allow the bars to cool completely before storing.
- Place them in an airtight container at room temperature for up to 3 days.
- For longer storage, refrigerate them for up to a week.
Freezing
- Cut the bars into squares and let them cool completely.
- Wrap each square individually in plastic wrap, then place them in a freezer-safe bag.
- Freeze for up to 3 months. Thaw in the refrigerator overnight when ready to eat.
Reheating
- If you prefer warm bars, preheat your oven to 350°F (175°C).
- Place the bars on a baking sheet and cover with foil.
- Bake for about 10-15 minutes until warmed through. Enjoy fresh from the oven!
FAQs
Here are some common questions about making Lemon Oatmeal Crumble Bars.
Can I make Lemon Oatmeal Crumble Bars gluten-free?
Absolutely! Simply substitute regular oats with certified gluten-free oats and ensure your other ingredients are also gluten-free.
What can I use instead of animal-derived gelatin in this recipe?
You can use a plant-based alternative like agar-agar or simply omit gelatin altogether if it’s not necessary for your filling consistency.
How long do Lemon Oatmeal Crumble Bars last?
When stored properly, Lemon Oatmeal Crumble Bars can last up to a week in the refrigerator or up to three months if frozen.
Are Lemon Oatmeal Crumble Bars suitable for parties?
Yes! These bars are great for gatherings as they are easy to cut and serve, making them a crowd-pleaser at any event.
Can I add other flavors to my Lemon Oatmeal Crumble Bars?
Certainly! Feel free to experiment by adding ingredients like blueberries or poppy seeds to give your Lemon Oatmeal Crumble Bars a unique twist.
Final Thoughts
I hope you find joy in making these delightful Lemon Oatmeal Crumble Bars! They bring together the tangy brightness of lemon with a comforting oatmeal texture that’s truly irresistible. Whether you’re preparing them for a family gathering or just treating yourself, these bars are sure to be a hit. Happy baking, and enjoy every delicious bite!
Lemon Oatmeal Crumble Bars
If you’re craving a delightful treat that combines creamy lemon filling with a crunchy oatmeal crust, these Lemon Oatmeal Crumble Bars are the perfect solution. With their bright citrus flavor and satisfying texture, they make an excellent dessert for any occasion—be it a family gathering or a simple weeknight snack. Easy to prepare and even easier to enjoy, these bars can be made ahead of time, ensuring you always have a sweet indulgence on hand. Once you take a bite, you’ll understand why they quickly become a favorite in homes everywhere!
- Prep Time: 15 minutes
- Cook Time: 38 minutes
- Total Time: 53 minutes
- Yield: Approximately 12 bars 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
- 1 cup rolled oats
- 1 cup all-purpose flour
- 1/2 cup brown sugar
- 1/2 cup melted coconut oil
- 1/4 teaspoon salt
- 1 cup fresh lemon juice (about 4–6 lemons)
- 1 can (14 oz) sweetened condensed coconut milk
- 2 tablespoons cornstarch
- Zest of 2 lemons
Instructions
- Preheat your oven to 350°F (175°C). In a bowl, mix rolled oats, flour, brown sugar, melted coconut oil, and salt until crumbly.
- Press two-thirds of this mixture into a greased baking dish and bake for 10 minutes until lightly golden.
- In another bowl, whisk fresh lemon juice, sweetened condensed coconut milk, cornstarch, and lemon zest until smooth.
- Pour the lemon filling over the baked crust, spreading evenly. Sprinkle the remaining crumble mixture on top.
- Bake for an additional 28-30 minutes until set and golden brown.
- Allow to cool completely before slicing into squares.
Nutrition
- Serving Size: 1 bar (60g)
- Calories: 180
- Sugar: 8g
- Sodium: 45mg
- Fat: 9g
- Saturated Fat: 7g
- Unsaturated Fat: 2g
- Trans Fat: 0g
- Carbohydrates: 25g
- Fiber: 3g
- Protein: 2g
- Cholesterol: 0mg
