Preheat oven to 350 degrees. Lightly grease a rectangular 13-by-9-by-2-inch pan.
In 3-quart saucepan, gently combine the semisweet chocolate and oil over very low heat until melted. Remove from heat and allow to cool.
In separate bowl, combine sugar, eggs and vanilla extract until blended. Add in chocolate mixture. Slowly sift in remaining dry ingredients and mix until combined. Fold in 1-1/2 cups candies.
Spread batter into pan. Sprinkle with remaining 1/2 cup candies and press lightly. Bake until brownies begin to pull away from sides of pan, about 30-40 minutes.