Recipe courtesy of Judy's Kitchen (
Adapted from The Baltimore Sun and Donna Macek
Rating:  9.5 out of 10

3/4 cup salted butter, softened
3/4 cup sugar, preferably superfine (whirl regular sugar in a food processor)
1 tsp. pure vanilla extract or vanilla powder
1 large egg
2 cups unbleached all-purpose flour
1/4 tsp. kosher salt
Chocolate Ganache Filling (see recipe below)
Heath bar bits

Heat oven to 350F.  Beat butter, sugar, vanilla and egg in a large bowl with electric mixer on medium speed, or mix with spoon.  Stir in flour and salt. Shape dough into 1” balls.  Place about 2” apart on ungreased cookie sheet. 

Press thumb or end of a wooden spoon into center of each cookie ball.  Do not press all the way to the cookie sheet.  Bake 7-11 minutes, or till edges are firm.  Quickly remake indentations with end of a wooden spoon if necessary.  Immediately remove from cookie sheet to wire rack.  Cool completely, about 30 minutes. 

Meanwhile, make Chocolate Ganache Filling – Heat 1/4 cup heavy cream in a 1-quart (or smaller) saucepan over medium heat, stirring, until steaming.  Remove from heat; stir in 1 cup semi-sweet chocolate chips till melted.  Cool about 10 minutes, or till thickened.  Spoon 3/4 of ganache into a plastic resealable sandwich bag.  Spoon remaining ganache into another bag.  Seal bags, squeezing out air.  Snip one corner of each bag:  the smaller bag with a very tiny snip for drizzling and the larger bag a larger snip to squeeze out ganache into cookie cavities.  Fill cavities with ganache.  Sprinkle each cookie with some of the Heath bar bits.  Drizzle remaining ganache from smaller bag onto cookie tops.  Yield:  about 3-1/2 dozen