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1
Place the popcorn kernels in a 2 1/2-quart microwave-safe bowl.
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2
Cover completely with a microwave-safe plate.
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3
Microwave on high (at 100 percent power) until the popping slows down to about 4 seconds between each pop, 4 minutes and 45 seconds.
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4
Remove just the plate using a potholder or thick dish towel, being careful to avoid direct contact with the hot steam from the bowl.
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5
Then remove the bowl.
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6
Place the butter in a microwave-safe liquid measuring cup.
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7
Microwave on high (at 100 percent power) until the butter just melts, 45 seconds.
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8
If the butter is not melted enough, microwave again in 10-second increments.
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9
Drizzle the popcorn with the butter, sprinkle with the salt and toss to distribute evenly.