Preheat oven to 350°F and line a baking sheet with parchment paper or silicone mat.
In a large bowl, cream together the butter, peanut butter, granulated sugar, and brown sugar until smooth.
Add the egg and vanilla extract and mix until fully combined.
In a separate bowl, whisk together the flour, baking soda, and salt.
In a separate bowl, whisk together the flour, baking soda, and salt.
Roll the dough into 1-inch balls, then roll each ball in sugar and place on the prepared baking sheet.
Bake for 9–10 minutes, until the edges are set but the centers still look slightly soft.
Remove from the oven and immediately press a mini chocolate egg into the center of each cookie.
Allow cookies to cool on the baking sheet for 3–5 minutes, then transfer to a cooling rack.