[superyob]

Originally Posted by aussiblue

Likely Pharaoh's Ants (Monomorium Pharaonis); they love butter. https://www.pestcontrol.org.au/ants.html

Thank you AB. You may have exposed the culprits, going by that web page.

Now to plan my diabolical vengeance...

ACME Pharoah's Ants 50 megaton nuclear missile is in the mail...