How to make an Aunt Roberta Cocktail via Common Man Cocktails

This is INSANELY POWERFUL! OH WEE! I bet this Aunt Roberta has a mustache, too. LOL.

Recipe
1 1/2oz. Vodka
1 oz. Absinthe
1/2 oz. 151
1/2 oz. Brandy
3/4 oz. Gin
1/2 oz. Blackberry Liqueur