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A round baking dish lined with parchment paper holds a golden-brown Irish Apple Cake crumble; green apples, spoons, plates, a jug of sauce, and a teapot are arranged nearby on a light surface.

Irish Apple Cake

Irish Apple Cake is what I make when I want homemade apple dessert without dealing with pie crust. This comforting Irish classic has tart apples that soften into cinnamon-spiced cake batter, all topped with golden streusel. Perfect for St. Patrick's Day celebrations, fall potlucks, or anytime you're craving something warm and buttery with custard. It stays fresh at room temperature for up to 2 days or refrigerated for 5 days, and slices freeze beautifully for 3 months.
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Prep Time: 20 minutes
Cook Time: 1 hour
Total Time: 1 hour 20 minutes
Course: Dessert
Cuisine: Irish
Keyword: Irish Apple Cake
Servings: 10
Calories: 560kcal

Ingredients

For the Cake:

Streusel Topping:

  • ¾ cup all-purpose flour
  • ¼ cup old-fashioned rolled oats
  • 6 tablespoons unsalted butter cold and cubed
  • ½ cup sugar

Custard Sauce:

  • 6 large egg yolks
  • 6 tablespoons sugar
  • 1 ½ cups heavy cream
  • 1 ½ teaspoons vanilla extract

Instructions

  • Preheat the oven to 375°F (190°C). Grease and line a round cake pan.
  • In a bowl, mix flour, sugar, and oats. Rub in the cold butter with your fingers until crumbly. Refrigerate until ready to use.
    ½ cup sugar, ¼ cup old-fashioned rolled oats, 6 tablespoons unsalted butter, ¾ cup all-purpose flour
  • In a large bowl, beat butter and sugar until light and fluffy. Add eggs one at a time, mixing well after each.
    2 large eggs, ½ cup sugar, ½ cup unsalted butter
  • In a separate bowl, whisk flour, baking powder, cinnamon, and salt. Fold into the butter mixture, then stir in the heavy cream.
    3 tablespoons heavy cream, 1 teaspoon baking powder, 1 teaspoon ground cinnamon, ⅛ teaspoon salt, 1 ¼ cups all-purpose flour
  • Spread the batter evenly in the pan. Arrange apple slices on top and sprinkle with the streusel.
    3 Granny Smith apples
  • Bake for 50 to 60 minutes, until golden and a toothpick inserted in the center comes out clean.
  • Let cool slightly, then dust with confectioners’ sugar before serving.
    Confectioners’ sugar

Custard Sauce:

  • In a saucepan, whisk egg yolks and sugar until smooth.
    6 large egg yolks, 6 tablespoons sugar
  • Slowly whisk in the heavy cream.
    1 ½ cups heavy cream
  • Cook over low heat, stirring constantly, until thick enough to coat the back of a spoon.
  • Remove from heat and stir in vanilla. Serve warm with the cake.
    1 ½ teaspoons vanilla extract

Video

Notes

  • Use cold butter for the streusel: It creates the crumbly texture you want, so keep it in the fridge until you're ready to mix it with the flour and oats.
  • Slice apples thinly and evenly: Thin slices bake more evenly and soften properly in the time it takes for the cake to cook through, so aim for slices about ⅛ inch thick.
  • Don't rush the custard: Cook it over low heat and stir constantly to prevent curdling or scrambling. Keep the heat gentle and be patient.
  • Try flavor variations: Add ¼ teaspoon nutmeg, allspice, or ground ginger to the spice mixture for extra warmth, swap white sugar for brown sugar in the streusel for a deeper molasses flavor, or fold ½ cup chopped walnuts into the streusel for added crunch.
  • Serve like coffee cakes: The tender crumb tastes incredible when you break off pieces with a fork, and the cake rises from the baking powder creates a light, flavorful cake that's perfect for brunch or dessert.
  • Flash-freeze before storing: Freeze slices on a baking sheet for 1 hour, then wrap them individually so they don't stick together, and the streusel stays intact.

Nutrition

Calories: 560kcal | Carbohydrates: 57g | Protein: 7g | Fat: 35g | Saturated Fat: 21g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 9g | Trans Fat: 1g | Cholesterol: 237mg | Sodium: 104mg | Potassium: 162mg | Fiber: 2g | Sugar: 34g | Vitamin A: 1318IU | Vitamin C: 3mg | Calcium: 84mg | Iron: 2mg
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