Begin by whisking together flour, cocoa powder, baking powder, and salt in a medium bowl. It’s important to combine these dry ingredients well to ensure an even distribution of flavors. Set the bowl aside for now as you move on to the wet ingredients.
In another large mixing bowl, use a hand mixer to combine vegetable oil, brown sugar, eggs, and vanilla extract. Beat them together until the mixture is smooth, creamy, and light in color. This step is crucial for achieving the right texture in your cookies.
Gradually add the dry ingredients to the wet mixture, mixing on low speed. You want to blend them until just combined, being careful not to overmix as this can lead to tough cookies. Stop mixing when you no longer see dry flour.
Next, scoop 1 tablespoon of dough and roll it into a ball. Don’t worry about spacing them on the cookie sheet just yet; we’ll chill the dough momentarily. Place the dough balls onto a cookie sheet lined with parchment paper or silicone baking mats.
Now, chill the cookie dough in the refrigerator for at least 30 minutes. Chilling the dough helps the cookies maintain their shape while baking and enhances the flavors.
While the dough chills, preheat your oven to 350°F (175°C). Prepare two cookie sheets with parchment paper or silicone baking mats so they are ready for baking.
Once the dough is chilled, take the bowl of powdered sugar and roll each cookie dough ball in it until fully coated. This will create that beautiful powdered exterior. Place the coated cookies evenly spaced on the prepared cookie sheets.
Now, it’s time to bake! Place the cookie sheets in the oven and bake for about 10 minutes. Watch for the cookies to flatten slightly and develop a lovely crackled top.
As soon as they come out of the oven, gently press a Mint Truffle Hershey’s Kiss into the center of each cookie. This step adds a melty, minty surprise that everyone will love. Allow the cookies to cool completely on the sheets before removing them.
Once cooled, store any leftovers in an airtight container for up to 3 days, or freeze them for up to 3 months. Trust me, they won’t last long!