Ingredients
Streusel Topping
- 120 grams (½ cup) plain or all-purpose flour
- 6 tablespoons unsalted butter, melted
- 50 grams (¼ cup) granulated sugar
- 50 grams (¼ cup) light brown sugar
- ¼ teaspoon cinnamon
- ¼ teaspoon salt
Blueberries
- 300 grams (0.66 lbs) fresh blueberries
- 2 teaspoons lemon juice
- 2 tablespoons sugar
- 2 tablespoons plain or all-purpose flour
Vanilla Cake
- 6 tablespoons unsalted butter, room temperature
- 30 ml vegetable oil
- 200 grams (1 cup) caster sugar
- 2 eggs
- 125 ml (½ cup) sour cream
- 2 teaspoons vanilla extract
- 210 grams (1 cup + ⅓ cup) plain or all-purpose flour
- 2 teaspoons baking powder
- ¼ teaspoon salt
- 60 ml (¼ cup) whole milk, room temperature
Instructions
- Streusel- Mix flour, sugars, salt and cinnamon in a small bowl. Pour in melted butter and mix with a fork until crumbs form. Chill in the fridge.
- Blueberries -In a bowl, toss the blueberries with lemon juice to lightly coat them. Sprinkle in the sugar and flour, then gently mix until the berries are coated. Set aside.
- Vanilla Cake- Preheat oven to 170°C Fan/190°C/375°F. Grease and line the sides and bottom of an 8-inch cake tin with greaseproof or parchment paper.
- Position the rack on the third shelf or in the centre of the oven.
- Sift flour, baking powder, and salt in a medium bowl. Set aside
- Using a hand mixer or stand mixer fitted with a paddle attachment, beat butter, oil, sugar, and vanilla bean paste until light and creamy for 10 minutes, scraping the bowl down occasionally.
- Add eggs one at a time, beating well after each addition. Scrape the bottom and sides of the bowl.
- Mix in sour cream.
- Switch to a rubber spatula. Gently fold in the flour mixture until it's mostly incorporated. Then, add the milk and continue mixing until everything is combined- don’t overmix!
- Assemble- Pour batter into the pan and scatter blueberries on top. Cover with chunks of crumb.
- Bake for 55-60 minutes, rotating the pan halfway, until a toothpick or skewer inserted into the centre comes out clean.
- Let the cake cool in the pan for 10 minutes and then remove it and place it on a cooling rack to cool completely.
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