Creamy Lemon Crumb Squares
There’s something uniquely satisfying about a dessert that perfectly balances sweetness and tartness, and Creamy Lemon Crumb Squares do just that. These delightful squares combine the richness of sweetened condensed milk with the zing of fresh lemon juice and zest, all nestled within a buttery, crumbly oat topping. Whether you’re looking for a treat to brighten your day or a delightful dessert for a gathering, this recipe is sure to impress. Get ready to create a luscious dessert that is as pleasing to the eye as it is to the palate.
Why Creamy Lemon Crumb Squares is Worth Your Time
Creamy Lemon Crumb Squares are not only a treat for your taste buds but also a joy to make. With a straightforward recipe that requires minimal ingredients, you can whip these up in no time. The crumbly oat base complements the creamy lemon filling beautifully, making every bite a harmonious blend of textures and flavors. They are perfect for any occasion, whether it’s a summer picnic, a cozy family gathering, or simply a treat to enjoy at home with a cup of tea. Plus, they can be made ahead of time, allowing the flavors to meld and intensify, making them an ideal candidate for meal prep or party planning.
What to Buy
To make your Creamy Lemon Crumb Squares, you’ll need to gather the following ingredients:
- 1/2 cup unsalted butter, slightly softened
- 1 cup brown sugar, lightly packed
- 1 1/3 cup all-purpose flour
- 1 cup old-fashioned oats
- 1 teaspoon baking powder
- 1/2 teaspoon salt
- 1 (14 ounce) can sweetened condensed milk
- 1/3 cup lemon juice (freshly squeezed is best)
- Zest of 1 lemon
Kitchen Gear Checklist
Before diving into the preparation, make sure you have the following kitchen gear:
- 9×9 inch baking pan – for baking the squares.
- Mixing bowls – for combining the ingredients.
- Whisk – to mix the wet ingredients smoothly.
- Measuring cups and spoons – for accurate ingredient measurements.
- Rubber spatula – for scraping down the sides of your bowl.
- Oven mitts – to handle the hot baking pan safely.
How to Prepare Creamy Lemon Crumb Squares

Get ready to create something delicious! Follow these simple steps to prepare your Creamy Lemon Crumb Squares.
Step 1: Preheat Your Oven
Start by preheating your oven to 350°F (175°C). This ensures that your squares bake evenly and come out perfectly golden.
Step 2: Prepare the Baking Pan
Grease your 9×9 inch baking pan with a little butter or line it with parchment paper for easy removal later on.
Step 3: Make the Oat Crust
In a large mixing bowl, combine the softened unsalted butter and the brown sugar. Use a whisk to mix them together until the mixture is light and fluffy. Add the all-purpose flour, old-fashioned oats, baking powder, and salt. Stir until just combined, creating a crumbly texture.
Step 4: Press the Mixture into the Pan
Take about two-thirds of the oat mixture and press it firmly into the bottom of the prepared baking pan. This will serve as the base for your creamy filling.
Step 5: Prepare the Lemon Filling
In a separate bowl, whisk together the sweetened condensed milk, lemon juice, and lemon zest until smooth. This luscious mixture will create the creamy layer between the oat crust and crumb topping.
Step 6: Assemble and Bake
Pour the lemon filling over the oat crust in the baking pan, spreading it evenly. Crumble the remaining oat mixture over the top of the lemon filling. This creates a delicious crumb topping that will bake into a golden crust.
Step 7: Bake and Cool
Place the pan in the preheated oven and bake for about 25-30 minutes, or until the top is golden brown and the filling is set. Once baked, remove from the oven and allow it to cool in the pan for at least 30 minutes before transferring to the refrigerator to chill completely.
Step 8: Cut and Serve
Once chilled, cut the Creamy Lemon Crumb Squares into squares or bars. Serve them cold or at room temperature, and enjoy the burst of citrusy flavor!
Nutrition-Minded Tweaks

If you’re looking to make your Creamy Lemon Crumb Squares a bit healthier, consider these options:
- Use whole wheat flour instead of all-purpose flour for added fiber.
- Replace some of the brown sugar with a natural sweetener like honey or maple syrup.
- Add some chia seeds to the oat mixture for extra nutrients.
- Opt for low-fat sweetened condensed milk to reduce calories.
Steer Clear of These
When making your Creamy Lemon Crumb Squares, it’s best to avoid:
- Overmixing the oat mixture, as this can lead to a tough crust.
- Using bottled lemon juice, which lacks the fresh flavor of real lemons.
- Skipping the chilling step, as it helps the squares set and enhances the flavor.
- Using margarine instead of butter, which may alter the texture and flavor.
Shelf Life & Storage
To keep your Creamy Lemon Crumb Squares fresh, store them properly:
- Refrigerate: These squares can be stored in an airtight container in the refrigerator for up to one week.
- Freezing: You can freeze them for up to 3 months. Just wrap them individually in plastic wrap and place them in a freezer-safe container.
- Thawing: When ready to enjoy, simply thaw in the refrigerator overnight before serving.
Troubleshooting Q&A
Why are my Creamy Lemon Crumb Squares too runny?
If your squares are too runny, it may be due to underbaking. Ensure you bake them until the filling is set and the top is golden brown. If they still seem runny, they may need a little more chilling time to firm up.
Can I use quick oats instead of old-fashioned oats?
While you can use quick oats, the texture will be slightly different. Old-fashioned oats provide a heartier texture and help create that perfect crumbly topping.
How do I know when the squares are done baking?
The squares are done when the top is golden brown and the filling is no longer jiggly. A toothpick inserted into the center should come out clean or with a few moist crumbs.
What can I do if I don’t have fresh lemons?
If you don’t have fresh lemons, you can use bottled lemon juice as a substitute, but keep in mind that the flavor may not be as vibrant. Adjust the amount according to your taste preference.
Serve with These
For a delightful experience, consider pairing your Creamy Lemon Crumb Squares with:
- A refreshing cup of herbal tea
- A scoop of vanilla ice cream
- A dollop of whipped cream
- Fresh berries or fruit salad
Final Bite
Creamy Lemon Crumb Squares are a perfect blend of creamy and crumbly, sweet and tangy. They’re easy to make and even easier to share, making them an excellent choice for any occasion. The bright lemon flavor will surely bring a smile to your face, and the crumbly topping adds just the right amount of texture. Whether you’re serving them at a gathering or enjoying them by yourself, these squares are a delightful treat.
With simple ingredients and straightforward steps, you can bring a slice of sunshine to your dessert table. So gather your ingredients, roll up your sleeves, and get ready to indulge in these Creamy Lemon Crumb Squares. Each bite is a burst of flavor that will leave you wanting more!

Creamy Lemon Crumb Squares
Ingredients
- 1/2 cup unsalted butter slightly softened
- 1 cup brown sugar lightly packed
- 1 1/3 cup all-purpose flour
- 1 cup old-fashioned oats
- 1 teaspoon baking powder
- 1/2 teaspoon salt
- 1 can sweetened condensed milk 14 ounce
- 1/3 cup lemon juice freshly squeezed is best
- 1 lemon zest of 1 lemon
Instructions
- Preheat your oven to 350°F (175°C) to ensure even baking and a golden finish.
- Grease a 9x9 inch baking pan with butter or line it with parchment paper for easy removal.
- In a large mixing bowl, whisk together the softened unsalted butter and brown sugar until light and fluffy. Add the all-purpose flour, old-fashioned oats, baking powder, and salt. Stir until just combined to create a crumbly texture.
- Press about two-thirds of the oat mixture firmly into the bottom of the prepared baking pan to form the base.
- In a separate bowl, whisk together the sweetened condensed milk, lemon juice, and lemon zest until smooth to make the creamy lemon filling.
- Pour the lemon filling evenly over the oat crust in the pan. Crumble the remaining oat mixture over the top as a crumb topping.
- Bake in the preheated oven for 25-30 minutes, or until the top is golden brown and the filling is set.
- Remove from oven and cool in the pan for at least 30 minutes. Then refrigerate until completely chilled before serving.
- Cut into squares or bars and serve cold or at room temperature. Enjoy the burst of citrusy flavor!
Equipment
- 9x9 inch baking pan
- Mixing Bowls
- Whisk
- Measuring Cups and Spoons
- Rubber spatula
- Oven mitts
Notes
- Use whole wheat flour instead of all-purpose for added fiber and nutrition.
- Replace some brown sugar with honey or maple syrup for a natural sweetness.
- Chill the squares thoroughly to allow the filling to set properly.
- Avoid overmixing the oat mixture to keep the crust tender and crumbly.
- Freeze leftovers wrapped individually for up to 3 months; thaw overnight in the refrigerator before serving.

