Ever get a craving for lemon pie or key lime pie? These Microwave Lemon Bars will totally hit the spot! They take just minutes to make; however, they do need to set in the fridge to cool completely. This post contains affiliate links.

Title image with microwave lemon bars with powdered sugar and whipped cream on a lemon towel.

Top them off with a dusting of powdered sugar or a dollop of whipped cream for a delicious lemony treat!

Table of Contents

What do you need to make Microwave Lemon Bars?

flour
powdered sugar
granulated sugar
lemons
butter
eggs
baking powder
salt

How do you make these Microwave Lemon Bars?

These go together really quick and easy, but you will need to refrigerate them to chill before cutting them.

Grease an 8 x 8 microwave-safe baking dish or line it with parchment paper.

A platstic bowl full of a crumbly crust mixture on a wooden background with a lemon towel

Combine the flour, sugar, and lemon zest together.

Stir in the melted butter.

Press the mixture into the bottom of the baking dish. I do this with my fingers and then use the back of a measuring cup to press it in nicely.

Microwave on HIGH for 2 1/2 to 3 minutes.

Check to make sure it’s done and firm. If it’s not done, microwave for an additional 30 seconds to 1 minute.

The microwave lemon bars crust pressed and cooked in an 8 x 8 microwave-safe baking dish.

Set the crust aside to cool.

Now it’s time to make the filling.

A glass bowl full of lemon bar filling on a lemon towel.

Combine the sugar, lemon zest, eggs, and lemon juice and beat until smooth.

Add the flour, baking powder and salt and continue beating for a couple more minutes.

The uncooked lemon bar filling in the baking dish for Microwave Lemon Bars

Pour the filling over the crust and microwave for 3 minutes.

Check the filling to see if it’s done. The middle may jiggle just a tiny bit. If it’s still soupy and not set, then microwave for an additional minute.

The finished version of the Microwave Lemon Bars still in the baking dish.

Put the baking dish in the fridge to cool for a few hours or if possible, overnight.

Cut into squares with a hot knife.

You can top these bars a couple of ways:

Dust with powdered sugar – or
Make a batch of fresh whipped cream and add a dollop in the center of each square.

Feel free to add additional lemon zest over the powdered sugar and whipped cream.

Squares of Microwave Lemon Bars on a lemon towel.

How do you make fresh whipped cream?

I make small batches of fresh whipped cream all the time. You can easily make it in a cereal bowl with a dash of sugar and 1/2 cup of heavy whipping cream.

Just use an electric mixer or a hand egg beater or even a milk frother. Believe it or not, I use the hand egg beater more than anything to make a quick batch in just a minute.

How do you store leftover Microwave Lemon Bars?

I recommend storing any leftovers in a sealed container in the fridge. I usually keep them for up to 3-4 days.

Can you make these Microwave Lemon Bars ahead of time?

I would encourage making them a day ahead since it’s best to let them cool overnight. However, I would wait to dust the powdered sugar or add the whipped cream until you’re ready to serve them.

More Microwave Dessert Ideas

9 bars

Microwave Lemon Bars

Name: Microwave Lemon Bars
Prep time: 5 min
Cook time: 6 min
Total time: 6 min
Yield: 9
Cuisine: American
Ingredients: 1 cup all purpose flour; 3 tablespoons powdered sugar; 1 tablespoon lemon zest; 6 tablespoons butter, melted; 1 cup white sugar; 3 tablespoons lemon zest; 3 large eggs; 1/3 cup fresh lemon juice; 1 tablespoon all purpose flour; 1/2 teaspoon baking powder; 1/4 teaspoon salt

Prep Time: 5 minutes

Cook Time: 6 minutes

Total Time: 6 minutes

Ingredients

Crust Ingredients

1 cup all purpose flour
3 tablespoons powdered sugar
1 tablespoon lemon zest
6 tablespoons butter, melted

Filling Ingredients

1 cup white sugar
3 tablespoons lemon zest
3 large eggs
1/3 cup fresh lemon juice
1 tablespoon all purpose flour
1/2 teaspoon baking powder
1/4 teaspoon salt

Instructions

Grease an 8 x 8 microwave-safe baking dish or line it with parchment paper.
Combine the flour, sugar, and lemon zest together.
Stir in the melted butter.
Press the mixture into the bottom of the baking dish. I do this with my fingers and then use the back of a measuring cup to press it in nicely.
Microwave on HIGH for 2 1/2 to 3 minutes.
Check to make sure it's done and firm. If it's not done, microwave for an additional 30 seconds to 1 minute.
Set the crust aside to cool.
Combine the sugar, lemon zest, eggs, and lemon juice and beat until smooth.
Add the flour, baking powder and salt and continue beating for a couple more minutes.
Pour the filling over the crust and microwave for 3 minutes.
Check the filling to see if it's done. The middle may jiggle just a tiny bit. If it's still soupy and not set, then microwave for an additional minute.
Put the baking dish in the fridge to cool for a few hours or if possible, overnight.
Cut into squares with a hot knife.
You can top these bars a couple of ways:

Dust with powdered sugar - or
Make a batch of fresh whipped cream and add a dollop in the center of each square.

Notes

Feel free to add additional lemon zest over the powdered sugar and whipped cream.

Store leftovers in a sealed container in the fridge.

Nutrition Information:

Yield:

Serving Size:

1
Amount Per Serving: Calories: 244Total Fat: 9gSaturated Fat: 5gTrans Fat: 0gUnsaturated Fat: 3gCholesterol: 82mgSodium: 171mgCarbohydrates: 37gFiber: 1gSugar: 25gProtein: 4g

Any nutritional information on justmicrowaveit.com should only be used as a general guideline. This information is provided as a courtesy and there is no guarantee that the information will be completely accurate.

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How to make Microwave Lemon Bars