Preheat your oven to 350°F (175°C). Prepare a 9×9-inch baking pan by lining it with parchment paper.

Combine ½ cup of chocolate chips with the vegetable oil in a microwave-safe bowl and microwave until smooth.

In a stand mixer bowl, combine granulated sugar, light brown sugar, eggs, vanilla, and peppermint extract. Beat on high until thick and airy.

Pour the cooled melted chocolate into the egg mixture, mixing gently until just combined.

Whisk together flour, cocoa powder, and salt in a separate bowl.

Add the flour mixture to the chocolate batter, mixing on low until just combined.

Gently fold in ½ cup of chocolate chips.

Pour the brownie batter into the lined pan and sprinkle with remaining chocolate chips.

Bake for 30-35 minutes until set and a toothpick comes out with a few moist crumbs.

Immediately sprinkle crushed peppermint candies on top after removing from oven.

Allow to cool completely in the pan before cutting into squares.