I started drinking too much alcohol during the lockdown era.

I experimented with non-alcoholic mocktails. The one that works for me is diet cola + milk in equal proportions. Somehow provides the combination of richness/creaminess, sweetness, bitterness that replaces the feeling of drinking Irish cream.

Diet cola contains aspartame. Anyone know if there's a safer non-sugar version of or alternative to diet cola that I could use instead?