3-Ingredient Lemon Bars

3-Ingredient Lemon Bars: A Surprisingly Simple Citrus Dessert

Lemon bars usually bring to mind a buttery shortbread crust and a silky, tangy lemon curd filling. But what if you could make a version with only three ingredients and almost no complicated steps? That’s exactly what the 3-ingredient lemon bars offer: a minimalist dessert that still delivers bright citrus flavor, soft texture, and a lightly sweet finish.

This recipe is ideal for beginners, busy bakers, or anyone who wants a quick dessert without sacrificing taste.

What You Need (Only 3 Ingredients)

To make these simplified lemon bars, you only need:

Sweetened condensed milk – provides sweetness and creamy structure
Fresh lemon juice – gives the bars their signature tangy flavor and helps them set
Eggs – act as a natural thickener, creating a custard-like texture when baked

That’s it—no flour, no butter, no complicated crust. The magic happens in how these three ingredients interact during baking.

Step-by-Step Method

Step 1: Prepare Your Baking Dish

Preheat your oven to 350°F (175°C).

Line a small square baking pan (usually 8×8 inches works best) with parchment paper. Leave a bit of overhang on the sides so you can easily lift the bars out later. This step prevents sticking and makes cleanup much easier.

Step 2: Mix the Ingredients

In a medium mixing bowl, combine:

1 can (about 14 oz) sweetened condensed milk
2–3 large eggs
About ½ cup freshly squeezed lemon juice

Whisk everything together until the mixture is completely smooth. At first, it may look slightly thin, but that’s normal. As it bakes, the eggs will set the mixture into a soft, custard-like layer.

For best results, use fresh lemon juice rather than bottled—it gives a brighter, cleaner flavor that really defines the dessert.