Step 1 of 12
Brown Sugar Cookies
Place the butter in a microwave-safe bowl. Microwave on high until melted, 30-40 seconds.
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Step 2 of 12
Brown Sugar Cookies
Transfer the melted butter to a large mixing bowl and add the brown sugar. Whisk together until combined.
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Step 3 of 12
Brown Sugar Cookies
Add the egg and vanilla extract. Continue whisking until the mixture is thoroughly combined.
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Step 4 of 12
Brown Sugar Cookies
Add the flour, baking soda, cornstarch, cinnamon, and salt to the bowl. Use a wooden spoon to stir vigorously until a soft and smooth dough forms.
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Step 5 of 12
Brown Sugar Cookies
Cover the bowl with plastic wrap and place in the refrigerator to chill for at least one hour.
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Step 6 of 12
Brown Sugar Cookies
Line two baking sheets with silicone baking mats or parchment paper. Set aside.
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Step 7 of 12
Brown Sugar Cookies
Preheat the oven to 350°F.
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Step 8 of 12
Brown Sugar Cookies
Remove dough from refrigerator. Form the dough into 20 balls and place on the prepared baking sheets.
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Step 9 of 12
Brown Sugar Cookies
Bake the cookies until they are just slightly golden brown on the edges and puffy on top, 11-13 minutes.
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Step 10 of 12
Brown Sugar Cookies
Check to see that cookies are done. Remove from oven or add time as needed.
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Step 11 of 12
Brown Sugar Cookies
Allow the cookies to cool for 5 minutes on the baking sheets. Transfer the cookies to cooling racks to cool completely.
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Step 12 of 12
Brown Sugar Cookies
Serve while still slightly warm or completely cooled. Leftover cookies may be stored in an airtight container at room temperature for 3 days, or 5 days in the refrigerator.