Step 1

Preheat the oven to 350°F (180°C). Line 2 baking sheets with parchment paper or silicone baking mats.

Step 2

In the bowl of a stand mixer fitted with the paddle attachment, lightly cream the butter on medium-high speed just until it is smooth, 1 to 2 minutes. Do not incorporate air into the butter. Scrape down the sides and bottom of the bowl.

Step 3

Add the icing sugar, cornstarch, vanilla bean paste, and salt and beat on low speed, gradually increasing to medium-high speed, until the mixture is smooth and no chunks remain, 1 to 2 minutes. Scrape down the sides and bottom of the bowl. Add the flour and mini eggs and mix on low speed, gradually increasing to medium-high speed, until the flour is fully incorporated, without whipping air into the dough, 1 to 2 minutes.

Step 4

Scoop twenty-one 1½-tablespoon portions of cookie dough onto each prepared baking sheet, leaving a little space between them. Gently press down on the cookies to flatten them to ¾-inch thickness. Bake, one sheet at a time, for 12 to 16 minutes, or until very lightly browned around the edges. Cool the cookies completely on the baking sheets.