What Irish lemon cake is
“Irish lemon cake” is not one single, strictly defined recipe. Online, the name is used for a few different bakes: a soft, pudding-style cake made with lemon curd, a lemon drizzle loaf, and other citrus cakes served at tea time. This article follows the first approach, which is also what many popular recipes under this name describe: a simple batter with lemon curd stirred in, baked until just set, with a tender, slightly custardy crumb.
I can’t point to one verified traditional recipe behind the name, so treat this as an Irish-style lemon cake: simple pantry ingredients, one bowl, and a bright lemon flavor. If you prefer a crisp sugar crust, a drizzle cake is a different but equally good option, and our lemon skillet cake is another one-pan lemon bake.
Ingredients
This makes one 8-inch (20 cm) square cake.
- 1 cup (200 g) granulated sugar
- 3 large eggs, at room temperature
- 1/4 cup (55 g) unsalted butter, melted and cooled slightly
- 1 cup (240 ml) whole milk
- 1 teaspoon vanilla extract
- 1 cup (about 300 g) lemon curd, homemade or store-bought
- 1 cup (125 g) all-purpose flour
- Zest of 1 lemon (optional, for extra lemon aroma)
- Powdered sugar, whipped cream, or berries, to serve
Quick homemade lemon curd
Store-bought curd works well, but homemade is easy and tastes fresher. If you end up with extra, our no-bake lemon curd desserts put it to good use. You can make it a day or two ahead.
- 4 large egg yolks
- 1/2 cup (100 g) sugar
- 1/2 cup (120 ml) fresh lemon juice (about 3 lemons)
- Zest of 2 lemons
- 4 tablespoons (55 g) unsalted butter, cubed
- Pinch of salt
Whisk the yolks, sugar, juice, zest, and salt in a small saucepan. Cook over low to medium-low heat, stirring constantly, until thick enough to coat the back of a spoon. Take it off the heat, stir in the butter until melted, and strain through a fine sieve. Cool completely before using. Keep the heat gentle so the eggs do not scramble.
How to make Irish lemon cake
- Heat the oven to 350°F (175°C). Grease an 8-inch square pan and line it with parchment.
- Whisk the sugar and eggs until pale and slightly thick.
- Stir in the melted butter, milk, and vanilla.
- Whisk in the lemon curd until smooth.
- Add the flour (and zest, if using) and stir just until no dry streaks remain. Do not overmix.
- Pour into the pan and bake for about 45 to 50 minutes, until the top is golden and the center is set. A toothpick should come out mostly clean, with perhaps a few moist crumbs.
- Cool in the pan. This cake is soft and tender, so cooling helps it hold together for slicing.
Ovens vary, so start checking a little early. The batter is thin before baking, which is expected.
Tips for a moist, bright lemon cake
- Use fresh lemons. Fresh juice and zest give a cleaner flavor than bottled juice. Zest first, then juice.
- Room temperature ingredients. Cold eggs added to warm butter can make the butter set into bits and affect texture.
- Do not overbake. Pull the cake when the center is just set. It keeps cooking from residual heat.
- Adjust the tang. A thicker, tarter curd gives a stronger lemon taste, so choose one you like.
- Measure flour carefully. Spoon and level it rather than scooping, which packs in extra flour.
Common lemon cake mistakes
- Overmixing the batter after adding flour, which can make the crumb tough.
- Overbaking, which dries out the cake. Start checking early.
- Using only juice and no zest. Most of the lemon aroma lives in the zest oils.
- Adding too much juice or acid to a recipe not designed for it, which can affect rise and texture.
- Opening the oven door early, which can cause a sunken center.
- Cutting while warm. Soft, custardy cakes slice more cleanly once cooled.
- Cooking curd over high heat, which can leave bits of cooked egg. Straining helps.
Serving ideas
Dust with powdered sugar, or serve with lightly sweetened whipped cream, crème fraîche, or fresh berries such as strawberries or raspberries. It is good warm-room-temperature with tea, or chilled on a warm day.
Storage and make-ahead
Because of the curd and eggs, store leftovers covered in the refrigerator and eat within about 3 days. Let slices come to room temperature before serving for a softer texture. You can make the curd a day ahead and bake the cake the next day.
Other traditional Irish cakes
If you are curious about traditional Irish baking more generally, commonly mentioned examples include barmbrack (a fruited tea bread), porter cake (a rich fruit cake), and sweet soda breads. Opinions on Ireland’s most famous dessert vary, so I will not name one. A lemon cake is a lovely, simple addition to a tea-time spread either way.
More lemon cakes to try
- A rolled sponge with a bright filling: lemon cake rolls, or the berry version, lemon blueberry roll cake.
- A sturdier, crumbly loaf: lemon polenta pound cake.
- A moist, frosted option for summer produce: zucchini cake with lemon cream cheese frosting.
FAQ
Can I use bottled lemon juice? You can, but fresh gives a brighter flavor. Keep the zest fresh either way.
Why did my cake sink in the middle? Common causes are underbaking, opening the oven early, or too much liquid. Bake until the center is set.
Can I make it in a different pan? A loaf or round pan can work, but baking time will change, so check early.
Does the cake need refrigeration? Since it contains eggs and curd, refrigerating leftovers is a sensible choice.