Gluten-free Caramelized Pineapple Upside-down Cake

 

The rum will ignite when you tilt the pan; this burns off the alcohol.

What you will need

1/2 cup packed brown sugar

1/4 cup unsalted butter, divided

1 vanilla bean, split lengthwise

6 (1/2-inch-thick) slices fresh pineapple

1/4 cup dark rum

Cooking spray

5 ounces gluten-free multipurpose flour (such as King Arthur Flour; about 1 cup)

1/4 cup almond flour

1/2 teaspoon baking powder

1/2 teaspoon kosher salt

1/4 teaspoon baking soda

1/2 cup light sour cream

2 tablespoons canola oil

2/3 cup granulated sugar

2 large eggs

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