Pre-heat the oven to 325 degrees Fahrenheit. In a small pot over low heat, combine 1 cup dark chocolate chips, olive oil, and milk or coffee. Stir continuously until the chocolate is completely melted.
Transfer to a large bowl and add eggs, sugar, and vanilla. Mix well.
Add flour, peanut powder, and salt. Stir until combined. Fold in the remaining ⅓ cup of dark chocolate chips.
Pour into a greased 8-inch square baking pan. Bake for 37 to 40 minutes or until a toothpick comes out clean. For fudgier brownies, bake for 35 to 37 minutes. Cool, slice, and sprinkle with more peanut powder.