Start with half of the liquids in a bowl of the mixer.
Add in all the confectioners’ sugar at once.
Mix on low to get started and once absorbed, turn it up to medium speed.
Add your paste or flavorings at this point. Let it mix for 10 minutes.
Stop the mixer and scrape the bowl.
Turn it back on low to medium-low and add the butter a stick at a time. Let the butter absorb, before adding the next stick. Turn the mixer to medium speed.
Add the sweetex or hi-ratio shortening in chunks.
Let it mix on medium to medium-high speed for 7 minutes.
Stop the mixer and scrape the bowl.
Turn it down to the lowest setting and slowly pour in the remaining liquids.
Once sort of absorbed, turn up the mixer to medium and then to high.
Mix for 2-3 minutes.
Scrape well and taste for sweetness.
Notes
Store in a container covered in the fridge for two weeks our outside fridge for up to a week.