Preheat the oven to 350 degrees F. Line 2 cookie sheets with parchment paper or nonstick foil
Melt the butter in a 3 quart saucepan set over medium heat.
Remove from heat and add the brown sugar and granulated sugar; whisk or stir until smooth.
Let cool for 5 minutes.While sugar cools, combine the flour, baking powder, and salt in a medium bowl and stir well.Once the butter mixture has cooled (it can still be a little warm), add the egg and vanilla and stir until blended.
Add the flour mixture and stir blended.
Let the dough cool slightly if it is still warm (about 10 more minutes), then stir in the chips and candy.Using a little less than 1/4 cup measure, drop scoops of dough on a baking sheet (6 to a sheet) spacing at least 3 inches apart.
Bake on center rack for 12 to 15 minute or until edges are lightly browned.
Let cool on the baking sheet for about 10 minutes. Using a spatula, lift the cookies from the sheet onto a rack and let cool completely.
