DIY "Sambuca"

16 oz good quality vodka (I used red label Smirnoff)
2 tsp fennel/anise seed
2 tsp Elderflower liqueur
1-2 "Glugs" Elderberry syrup

Shake well. Let sit for a week.

I might have to add more syrup to boost sweetness, but I think I have the flavor profile spot on.

I might have to make some DIY limoncello, too.