Here's a breakdown:
* Mis: My (possessive pronoun)
* Tías: Aunts
* Saben: Know (verb "saber")
* Hacer: To make (verb "hacer")
* Dulce: Sweet (adjective)
So, the phrase literally translates to "my aunts know how to make sweet". This could be interpreted as:
* My aunts are good at making sweets.
* My aunts are skilled in baking and making desserts.
* My aunts have a knack for creating delicious sugary treats.
It suggests that the speaker's aunts are known for their abilities in making sweets, possibly implying a family tradition or a special talent.