Easy Berry Cake with Crumb Topping

Bahan-bahan (12 porsi)

• 3 large eggs (room temp)
• 1 cup granulated sugar
• 1/4 cup light olive oil
• 2 cups all-purpose flour (measured correctly)
• 2 1/2 tsp baking powder
• 1 Tbsp lemon zest from 1 large lemon
• 1 tsp vanilla extract
• 1/3 cup seltzer water or club soda
• 10 oz mixed berries (2 cups*)
• 3/4 cup all-purpose flour
• 1/4 cup granulated sugar
• 4 Tbsp unsalted butter (softened)
• 1/4 tsp sea salt