Strawberry Rhubarb Crumble Cake Recipe from Jessica Seinfeld

Ingredients

• nonstick vegetable oil cooking spray
• ¾ cup all-purpose flour
• 3 tablespoons granulated sugar
• 3 tablespoons dark brown sugar
• ½ teaspoon ground cardamom
• ¼ teaspoon kosher salt
• ¼ cup (½ stick) unsalted butter, melted
• 1½ cups thinly sliced rhubarb (2 to 3 stalks)
• 12 small strawberries, halved
• 1¼ cups granulated sugar
• 1½ cups all-purpose flour
• ½ teaspoon baking powder
• ¼ teaspoon baking soda
• ½ teaspoon kosher salt
• ½ cup buttermilk
• 1 teaspoon pure vanilla extract
• ½ cup (1 stick) unsalted butter, at room temperature
• 2 large eggs