Preheat oven to 350 degrees. Prepare a 9 inch baking dish with non-stick spray or line with parchment paper. Set aside.
In a large bowl mix together melted chocolate and oil until smooth and well combined. Beat in eggs and sugar until really well incorporated. Add in the flour and salt and mix until it is just combined and no white streaks remain.
4 oz unsweetened chocolate, 2/3 cup vegetable oil, 2 cups granulated sugar, 4 whole large eggs, 3/4 cup all-purpose flour, 1 teaspoon salt
Pour 1/2 the batter into the prepared pan. Place unwrapped peppermint patties evenly spaced around the pan. Cover with remaining batter.
16 peppermint patty candies
Bake for 30-35 minutes, until a tester comes out mainly clean.
Remove from the oven and let cool completely before serving.