The Kitchn: This chocolate sheet cake is the best use for ripe bananas
1 teaspoon kosher salt
1 1/2 cups whole milk
6 ounces chopped semisweet chocolate (1 cup)
For the frosting:
1 cup creamy peanut butter
6 ounces cream cheese, at room temperature
6 tablespoons unsalted butter, at room temperature
1/3 cup powdered sugar
1 teaspoon vanilla extract
Flaky sea salt, for sprinkling
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