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Preheat oven to 350°. Grease an 8-inch square baking pan.
Toss chopped cherries in 1 tablespoon flour. In a separate bowl, whisk together 1 cup flour and salt. Set both aside.
Melt chocolate and butter in microwave at 30-second intervals until butter is melted. Stir until chocolate has melted and mixture is smooth.
In a large bowl, beat sugar, eggs, and vanilla until smooth. Add chocolate mixture and mix until combined.
Gradually add flour mixture, mixing just until combined. Stir in cherries.
Spread batter evenly in prepared pan. Bake for 30 minutes, or until a pick inserted in the center comes out with moist crumbs.
Cool completely in pan before cutting into bars.