The correct plural form of "la carne sabrosa" is C. carnes sabrosas.
In Spanish, when forming the plural for nouns, you typically add an -s or -es depending on the ending of the word. Since "carne" (meat) is a feminine noun, it remains feminine when pluralized. The adjective "sabrosa" (tasty) also agrees in gender and number, changing to "sabrosas" to match "carnes."