*Make sure your hot fudge sauce is spreadable, but not hot.
Line a baking sheet with wax or parchment paper. Add the crushed chocolate cookie crumbs to a bowl and stick a spoon in the warm fudge sauce. Grab a large plate to work over, one that can catch your drippings + crumbs.
Working with one bar at a time (leaving the rest in the freezer), spread a layer of fudge sauce over the outside of the entire bar. Quickly sprinkle the crushed chocolate cookie crumbs over the fudge sauce, turning the bar as you go to make sure the entire bar is covered. Once the bar is covered in cookie crumbs, place on the prepared baking sheet and place in the freezer.
Repeat with the remaining bars, adding them to the baking sheet in the freezer as you go.
Once all the bars have been covered in fudge sauce and cookie crumbs, allow to sit in the freezer at least 30 minutes or longer.
Once the bars are frozen again remove from the freezer one at a time. Now add a dollop of whipped cream to the top of the bar. Spread the cream out a little so it covers about a 1/4 of the bar, then add the sprinkles. Return the bar to the freezer and repeat with the remaining bars.
Once the bars are all complete, allow them to sit in the freezer at least two hours or until ready to serve. If desired add a birthday candle, blow it out and eat up!