Authentic Irish Apple Cake

Name: Irish Apple Cake
Prep time: 35 min
Cook time: 1 h
Total time: 1 h 35 min
Yield: 10
Ingredients: 1/2 cup unsalted butter, at room temperature; 1/2 cup granulated sugar; 2 large eggs; 3 Tbsp whole milk or cream; 1 1/4 cups all purpose flour; 1 tsp baking powder; 1 tsp cinnamon; 1/8 tsp salt; 3 Granny Smith apples, peeled and thinly sliced; confectioner’s sugar, for dusting; 3/4 cup all purpose flour; 1/4 cup old fashioned rolled oats; 6 Tbsp unsalted cold butter, cut in small pieces; 1/2 cup granulated sugar; 6 large egg yolks; 6 Tbsp granulated sugar; 1 1/2 cups whole milk; 1 1/2 tsp vanilla

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Some cakes feel like a memory before you even take a bite. This Authentic Irish Apple Cake is that kind of bake.

It is an authentic old fashioned Irish apple cake, the sort of cake made throughout apple harvest season all over Ireland, where every farmhouse has its own prized version.

Mine brings together a soft cinnamon batter, a generous layer of tart sliced apples, and a buttery oat streusel that turns golden in the oven.

It is delicious with or without the traditional custard sauce. I will be honest with you, though. Once you have poured warm vanilla custard over a slice still steaming from the pan, plain cream starts to feel like a compromise.

Either way, this cake is forgiving, simple, and the kind of thing you will make twice in one month without thinking about it.

Jump To

1. Authentic Irish Apple Cake
2. a classic apple cake filled with juicy apples and warm spices

3. best apples for an apple cake
4. the crumble topping makes this cake especially appropriate for breakfast, brunch, or afternoon tea
5. Ingredients
6. Instructions
7. Recipe details
8. FAQs
9. Irish Apple Cake

a classic apple cake filled with juicy apples and warm spices

This is a cake that seems to arrive from another era and another continent, yet its appeal is completely universal. The scent of apples and cinnamon drifting through the house does something to people. Suddenly everyone wanders into the kitchen asking what smells so good, and nobody leaves empty handed.

The cake itself is mildly spiced. One teaspoon of cinnamon is enough to warm the crumb without turning it into a spice cake. What you get instead is a tender, lightly sweet batter wrapped around an inner core of thinly sliced tart apples, finished with a crumbly oat streusel that adds texture to every bite.

Authentic Irish Apple Cake, a classic apple cake filled with juicy apples and warm spices

It is also genuinely easy. You cream, you fold, you layer, and you bake. No folding techniques to memorize, no finicky decorating, no stress about a perfect crumb. The apples do most of the work for you.

Tradition dictates serving it with thick cream or a luscious custard sauce. In Ireland that choice is almost a household rule, though nobody agrees on which one wins. You are in charge here. Respect the tradition or flaunt it, the cake will not hold it against you.

best apples for an apple cake

I reach for Granny Smith apples almost every time. They are nice and tart, and they do not get mushy in the oven, which matters a lot when the fruit sits in a layer right on top of the batter. Honeycrisp is another good choice if you want something a touch sweeter with a pleasant crunch that survives baking.

Beyond those two, feel free to experiment. A firm baking apple that holds its shape is the only real requirement. Softer varieties will still taste lovely, they simply melt into the cake rather than staying distinct, and some bakers actually prefer that softer, almost saucy result.

Authentic Irish Apple Cake, best apples for an apple cake

You will need about 3 good sized apples. Peel them and slice them thinly. Thin slices stack into that tender apple core instead of turning into chunky pockets of fruit that push the streusel off course.

One practical note. If you peel and slice your apples more than a few minutes ahead of baking, toss them with a little lemon juice. It keeps them from browning while you finish the custard and the streusel. I learned that one the hard way, with a bowl of apples that turned brown while I was busy whisking.

the crumble topping makes this cake especially appropriate for breakfast, brunch, or afternoon tea

Here is what I love about this cake. It is not too sweet, following the European tradition, so it never feels like a dessert that has been dropped into the morning by mistake.

The oat streusel on top makes it feel perfectly at home with coffee or tea, whether that is a slow weekday morning, a weekend brunch, or a mid afternoon break when you need something small and kind.

Authentic Irish Apple Cake, the crumble topping makes this cake especially appropriate for breakfast, brunch, or afternoon tea

That said, it is special enough to serve as dessert, especially when you pair it with the custard. Warm cake, cold custard, a spoon, and a quiet corner. That is the whole plan.

The custard sauce keeps well in the fridge, so making it ahead costs you nothing and saves you a scramble later. It can be served warm or cold, whichever you prefer. And the cake is especially fragrant and fabulous warm from the oven, when the streusel still crackles a little under your fork and the apples are at their juiciest.

Ingredients

This recipe has three parts, and each one earns its place. Read through the list once before you start so nothing surprises you halfway through.

Cake

1/2 cup unsalted butter, at room temperature
1/2 cup granulated sugar
2 large eggs
3 Tbsp whole milk or cream
1 1/4 cups all purpose flour
1 tsp baking powder
1 tsp cinnamon
1/8 tsp salt
About 3 Granny Smith apples, peeled and thinly sliced, which came to a little over a pound after slicing in the original recipe

Confectioner’s sugar, for dusting

Streusel topping

3/4 cup all purpose flour
1/4 cup old fashioned rolled oats
6 Tbsp unsalted cold butter, cut in small pieces
1/2 cup granulated sugar

Custard sauce

6 large egg yolks
6 Tbsp granulated sugar
1 1/2 cups whole milk, or half and half or cream if you want it richer
1 1/2 tsp vanilla

If you keep old fashioned rolled oats in the pantry, this cake is mostly a matter of what you already have on hand. That is one reason it shows up so often at my house in October.

Instructions

Preheat the oven to 350F and grease a 9 inch springform pan. I usually start the custard first, because it needs time to chill and you do not want to be waiting on it while the cake cools.

Make the custard sauce ahead of time. Bring the milk to a simmer over medium heat. Meanwhile, whisk the yolks and sugar until well combined.
Drizzle a little of the hot milk into the egg mixture, whisking all the time. Drizzle in a little more, then transfer that mixture back into the pan of hot milk. This tempering step is what keeps the eggs smooth instead of scrambled.
Continue cooking slowly over medium heat, stirring constantly, until the mixture coats the back of a spoon. A silicone spoon or spatula is ideal here so you can scrape the bottom and sides of the pan as it heats. The custard will become velvety and thickened, but it will not be as thick as pudding. It will continue to thicken as it cools, so do not overcook it or it can curdle. Stir in the vanilla.

Pour the custard through a sieve to catch any stray lumps, into a heatproof jar or bowl. Press a piece of plastic wrap onto the surface so it will not form a skin as it cools. Refrigerate until completely chilled.
To make the streusel topping, blend the bits of cold butter into the flour, sugar, and oats until the butter is incorporated and the mixture has a coarse, crumbly texture. Put it in the refrigerator while you make the cake.
Cream together the butter and sugar until light and fluffy. Beat in the eggs, one at a time.

Whisk together the flour, baking powder, cinnamon, and salt. Fold the dry ingredients into the butter and sugar mixture, along with the milk or cream. The batter will be thick and soft, closer to a drop biscuit dough than a pourable cake batter, and that is exactly right.
Spoon the batter into your prepared pan and smooth it out evenly. Top with the sliced apples, and then the streusel topping. There is no need to arrange the apples perfectly, but try to get them into an even layer so every slice gets fruit.
Bake for about 50 minutes to an hour, until the top is lightly browned and a toothpick comes out without wet batter clinging to it.

Let the cake cool a bit in the pan before removing it. Dust with confectioner’s sugar before serving.

Keep an eye on the custard. Once it coats the back of a spoon, it is done. It thickens more as it cools, and pushing it further is how curdling happens.

A quick word on serving. The custard can be served warm or cold. If you want it warm, reheat it gently in a saucepan over low heat, stirring constantly, or in short bursts in the microwave. The cake is especially good warm from the oven.

The pan matters more than you might think. A 9 inch springform makes it easy to release the cake without flipping it, and the removable ring keeps the streusel intact. If you only have a regular round cake pan, line the bottom with parchment and be gentle when you lift the slices out.

Check the cake at 50 minutes and let it go longer only if it needs it. Every oven runs a little different, and an apple cake that bakes too long loses the soft, juicy layer that makes it special.

If you are baking ahead, the cake holds well at room temperature for a day or so, covered loosely. The custard stays in the fridge, chilled and ready, which makes the whole thing feel effortless when guests arrive.

I have served this on a Tuesday night with nothing but mugs of tea, and I have served it on a holiday table with the good plates. It works either way.

Recipe details

Here is the at a glance version, so you can plan your baking window before you start measuring.

Detail	Value
Prep time	35 minutes
Cook time	1 hour
Total time	1 hour 35 minutes
Servings	10
Oven temperature	350F

The source nutrition comes in at about 372.87 calories per serving, with 49.8 g carbohydrates, 4.66 g protein, 17.7 g fat, 2.47 g fiber, and 26.94 g sugar. Values shift a little depending on your apples and whether you use milk, half and half, or cream in the custard.

FAQs

What is the difference between Irish apple cake and American apple cake?

Irish apple cake is a rustic, single-layer cake with a thin batter and a thick layer of tart apple slices topped with a crisp oat streusel, while American apple cake is often taller, layered, and has chunks of apple folded into the batter. The Irish version is less sweet, in the European tradition, and is traditionally served with warm custard sauce or thick cream.

What are the best apples for making authentic Irish apple cake?

Granny Smith apples are the best choice for authentic Irish apple cake because they are tart and hold their shape well during baking without becoming mushy. Honeycrisp apples are also a good alternative. The classic Irish cooking apple, Bramley's Seedling, is ideal for its sharp flavor but can be hard to find in the United States.

How should I store leftover Irish apple cake and keep the streusel topping crisp?

Store leftover Irish apple cake in an airtight container at room temperature for up to two days. To revive the streusel's crispness, reheat individual slices in a microwave for about 15 seconds or in a 300°F oven for 8 to 10 minutes. The cake is best enjoyed on the day it is baked.

Can I make the custard sauce for Irish apple cake in advance?

Yes, the custard sauce can be made one to two days in advance and stored in the refrigerator. After cooking, pour it through a sieve and place plastic wrap directly on the surface to prevent a skin from forming. Reheat the custard gently over low heat, stirring constantly, or in short microwave bursts before serving.

Authentic Irish Apple Cake Recipe with Oat Streusel and Custard