It's fine! You can let it set for a few minutes, then mix. The cold milk caused the butter to harden a bit. If you just added the other stuff now, you'd be fine. The worst that would happen would be tiny pockets of a little extra buttery goodness!
It's fine! You can let it set for a few minutes, then mix. The cold milk caused the butter to harden a bit. If you just added the other stuff now, you'd be fine. The worst that would happen would be tiny pockets of a little extra buttery goodness!