Ingredients

¾cupbutter,(1½ sticks) unsalted, softened to room temperature

¾cuplight brown sugar,or dark brown sugar, packed

¼cupgranulated sugar

1large egg,at room temperature

2tsppure vanilla extract

2cupsall-purpose flour,spoon and leveled

2tspcornstarch

1tspbaking soda

½tspsalt

1¼cupspeanut butter M&Ms,or regular M&Ms, or peanut M&Ms, or chocolate chips

½cupsprinkles

24Peeps marshmallow candies

Preparation

In a large bowl using a hand-held mixer or stand mixer with a paddle attachment, beat the butter for 1 minute on medium speed until completely smooth and creamy.

Add the brown sugar and granulated sugar and mix on medium speed until fluffy and light in color.

Mix in the egg and vanilla. Scrape down the sides and bottom of the bowl as needed.

In a separate bowl, combine the flour, cornstarch, baking soda, and salt.

At low speed, slowly mix into the wet ingredients until combined. The cookie dough will be quite thick.

Add the peanut butter M&Ms and sprinkles, and mix for about 5 seconds until evenly disbursed.

Cover the dough tightly with aluminum foil or plastic wrap and chill for at least 1 hour and up to 2 days.

Remove the cookie dough from the refrigerator and allow it to sit at room temperature for 10 minutes.

Preheat the oven to 350 degrees F.

Line a large baking sheet with parchment paper or a silicone baking mat. Set aside.

Once chilled, the dough will be slightly crumbly, but will come together once the dough is worked with the hands as they’re rolled into individual balls.

Roll the balls of dough, about 1½ tablespoons of dough each, into balls.

Bake for 8 to 10 minutes, until barely golden brown around the edges. They will look extremely soft when you remove them from the oven.

Allow to cool for 5 minutes on the cookie sheet.

Transfer to a cooling rack to cool completely at room temperature.

Then stick the cookies into the refrigerator for at least 30 minutes. Cold cookies will be needed to make the sandwiches.

Arrange 2 Peeps Marshmallow onto half of the cold cookies.

Microwave, 1 by 1, for 8 to 12 seconds until the marshmallow begins to puff up.

Depending on the microwave wattage, do not microwave for more than that, or the cookie will fall apart and be too fragile to pick up.

Smoosh another cookie on top, creating a sandwich.

Cookie sandwiches taste the best right after they are made.