Preheat oven to 350ºF. Spray a 9" square baking pan.
Melt chocolate in a microwave-safe bowl on high, in 20-second bursts, stirring after each. Set aside to cool a bit.
In a bowl, beat oil, sugar and eggs until smooth. Stir in chocolate. Stir in flour, cherries and salt.
Scrape batter into the pan and bake until a toothpick comes out clean, 20-25 minutes.
Let cool completely.