The Kitchn: Raspberries, cookie butter take your oatmeal to the next level
Butter, for coating the baking dish
1 1/2 cups old-fashioned rolled oats
1/2 teaspoon baking powder
1/2 teaspoon kosher salt
5 large egg whites, at room temperature
1/3 cup speculoos cookie butter
1 1/2 cup whole milk
1/2 cup heavy cream
1 teaspoon vanilla extract
1 1/2-inch fresh ginger, peeled and finely grated
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