Ingredients

2 large eggs
1 cup (210 grams) granulated sugar
1 cup (8oz) sour cream
½ cup light olive oil or vegetable oil
1 tsp vanilla extract
¼ tsp salt
2 cups (260 grams) all-purpose flour*
2 tsp baking powder
1 medium lemon (zest and juice), divided
½ Tbsp cornflour
16 oz (450g) fresh** blueberries
Powdered sugar to dust the top, optional
Instructions

Prep:

Lightly butter a 9-inch springform pan and line the bottom with parchment. Preheat Oven to 180C/160C fan oven.
Method:

Beat 2 eggs and 1 cup sugar with whisk attachment on high speed 5 min, or until light in color and thick.
Add 1 cup sour cream, ½ cup oil, 1 tsp vanilla, ¼ tsp salt and whisk on low speed until well combined.
Whisk together the 2 cups flour with 2 tsp baking powder then add to batter ⅓ at a time, whisking to incorporate with each addition. Finally, add 1 Tbsp lemon juice and ½ Tbsp zest.
Rinse blueberries and drain well. In a medium bowl, toss blueberries with ½ Tbsp cornflour   and 1 tsp lemon juice, stirring until well combined and no dry white cornflour remains.
Pour half of batter into prepared springform pan and spread evenly. Top with half of the blueberries. Spread with remaining batter then sprinkle the rest of the blueberries evenly over the top, pushing them slightly into the batter (about halfway). Bake for 45 to 55 min, or until a toothpick inserted in center comes out clean. Let cake rest in the pan 15-20 min then remove ring and cool until room temp or just warm. Serve dusted with powdered sugar.
Notes

**If using frozen blueberries, thaw and drain then toss with 1 Tbsp cornstarch and omit lemon juice. Do not add more than 16 oz blueberries
or they weigh down the cake.
*measure flour by spooning into measuring cup then scraping off the top.