Lemon Crumb Bars

Featured in Indulgent Dessert Recipes to Satisfy Any Sweet Tooth.

These bars have a crumbly oat crust paired with a tangy lemon filling, made with fresh zest, juice, and condensed milk for the right sweet-tart combo. The same mixture acts as both crust and topping. After baking, let them cool completely, refrigerating if you'd like them firmer. Use parchment paper for easy lifting and cutting.
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Updated on Tue, 06 May 2025 12:50:07 GMT
Sweet Lemon Bars Pin it
Sweet Lemon Bars | chefmelt.com

A sunny and rich Lemon Crumb Bars that hits the sweet and tangy notes just right. Each square packs a soft oat crumble foundation, zesty lemon center, and extra crumble topping, making a snack that's like biting into a ray of sunshine.

Whenever I bake these squares, I think about my grandma's lemon trees and how she always said desserts should give your taste buds a little kick. The first batch I brought to a springtime get-together had people begging for instructions before they'd even finished eating.

Key Components

  • Unsalted Butter: Let it sit out first
  • Old-Fashioned Rolled Oats: Adds nice bite
  • Fresh Lemons: For skin and juice
  • All-Purpose Flour: Gently measured
  • Light Brown Sugar: Gives sweet depth
  • Large Eggs: Not cold from fridge
  • Pure Vanilla Extract: For richness
  • Kosher Salt: Brings out taste

MAKING IT STEP BY STEP

1. Mix The Crumble:
Stir melted butter with brown sugar till blended. Throw in oats, flour, and a dash of salt, mixing until you get crumbs that stick together when pressed. Set aside 1 cup for the top.
2. Make The Bottom:
Pack the rest of your crumbs down hard into a 9x13 pan, making it flat all over. Pop in a 350°F oven for 15 minutes till it looks slightly golden. Let it cool a bit while you work on the filling.
3. Whip Up Lemon Mix:
Rub lemon zest into sugar with your fingers to get all the oils out. Add in eggs, lemon juice, and flour, stirring until it's silky smooth with no lumps. It should look bright and taste zingy.
4. Put It Together:
Pour your lemon mixture onto the slightly cooled base. Scatter the saved crumble all across the top, making some bigger chunks for a fun texture.
5. Bake To Finish:
Stick it back in the oven for 25-30 minutes until the filling doesn't wiggle much but still has a little jiggle in the middle. The edges should be light gold. Let it cool fully in the pan on a rack.
Lemon Crumb Bars Recipe Pin it
Lemon Crumb Bars Recipe | chefmelt.com

My grandma's trick for amazing lemon bars was just waiting. "Give them time to cool down completely," she'd warn, "or you'll end up with runny lemon soup instead of proper bars."

Easy Lemon Crumb Bars Pin it
Easy Lemon Crumb Bars | chefmelt.com

Keeping Them Fresh

Keep your bars in a sealed container at room temp for up to 3 days, or stick them in the fridge for a week. Put some parchment between layers so they don't stick together. Want to save them longer? Wrap them one by one and freeze for up to 3 months. Let them thaw in the fridge overnight for the best feel.

How To Enjoy Them

These treats taste great no matter how you serve them. Enjoy them cold for a cool summer snack, or let them warm up to room temp for the fullest flavor. For fancy times, sprinkle some powdered sugar right before serving, or add a bit of whipped cream and some fresh berries on top.

Easy Lemon Crumb Bars Recipe Pin it
Easy Lemon Crumb Bars Recipe | chefmelt.com

Fun Twists

Try playing around with different citrus mixes - maybe lemon and lime together, or swap in orange for something sweeter. Throw in a few blueberries to the filling for a classic combo, or mix some crushed almonds into the topping for extra crunch. In winter, add warm spices like cardamom or ginger to the crumbly parts. This recipe's pretty flexible while still keeping that perfect balance of sweet and tangy.

Frequently Asked Questions

→ Is fresh lemon juice necessary?
Using fresh juice gives the best taste, but bottled works if needed. Just don’t skip the zest!
→ What’s the best way to store them?
Keep them in an airtight container. They’re fine at room temp for 3 days or in the fridge for up to a week.
→ Can I freeze these treats?
Absolutely! Wrap them tightly and freeze for 3 months. Let them thaw in the fridge overnight.
→ Why’s my filling too soft?
Ensure they’re fully cooled before cutting. If needed, chill them in the fridge for 30 minutes.
→ Can I make a bigger batch?
Yep! Double everything and use a 9x13 pan. Bake for an extra 5-10 minutes.

Lemon Crumb Bars

Tangy lemon and creamy filling layered between buttery oat crumbs. Perfect for an after-dinner treat or midday pick-me-up.

Prep Time
15 Minutes
Cook Time
40 Minutes
Total Time
55 Minutes

Category: Dessert Recipes

Difficulty: Intermediate

Cuisine: American

Yield: 12 Servings (12 squares)

Dietary: Vegetarian

Ingredients

→ Crumble Base & Topping

01 3/4 teaspoon kosher salt, split
02 1 1/4 cups quick-cooking or old-fashioned oats
03 1 cup plain all-purpose flour
04 3/4 cup brown sugar, firmly packed (light or dark works)
05 8 tablespoons (1 stick) butter, unsalted
06 3/4 teaspoon baking powder

→ Lemon Layer

07 1 can (14 oz) sweetened condensed milk
08 Juice and zest of 2 large or 3 medium lemons

Instructions

Step 01

Set your oven to preheat at 350°F. Use two strips of parchment paper to line an 8x8 pan with some overhang for easy lifting later.

Step 02

Melt the butter and stir it together with brown sugar, baking powder, and a portion of the salt. Add in the oats and flour. Set 1 cup aside for the crumbles on top.

Step 03

Take the leftover crumb mix and press it firmly into the base of your pan. Pop it in the oven until it turns golden, about 12-14 minutes.

Step 04

In a bowl, mix the lemon zest, juice, condensed milk, and the pinch of salt left over. Whisk it until it looks smooth and creamy.

Step 05

Pour the lemon mixture over the hot crust. Scatter the reserved crumb mixture on top and bake again for 22 to 24 minutes, until edges are browned.

Step 06

Let it cool on the counter completely, around 1 1/2 hours. You can chill in the fridge for 30 minutes if you want them firmer. Slice into 12 squares.

Notes

  1. Chilling in the fridge helps firm up the lemon layer.
  2. Tastes best when served at room temperature.
  3. Lift out easily by using the parchment overhang.

Tools You'll Need

  • Square 8x8 pan
  • Parchment paper for lining
  • Bowl that can go in microwave
  • Cooling rack

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Includes dairy (butter, condensed milk)
  • Includes wheat (flour)

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 285
  • Total Fat: 11 g
  • Total Carbohydrate: 42 g
  • Protein: 5 g