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Preheat the oven to 350 F. Line a 12 cup muffin pan with cupcake liners.
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In a medium bowl, whisk together the flour, baking powder, and salt.
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In a large bowl, beat the butter and sugar until light and fluffy (about 3 minutes).
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Add the vanilla to butter mixture and beat on low speed. Add the eggs, one at a time, mixing well after each addition.
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Add the crushed pineapple and mix to combine.
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Gradually add the flour mixture, beating just until combined.
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Divide the batter into the prepared muffin pan. Bake for 15-20 minutes or until a toothpick inserted comes out clean.
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Cool the cupcakes in the pan for 5 minutes before transferring to a wire rack. Cool completely before frosting.