curdle
cur·dle | \ ˈkər-dᵊl \
curdled; curdling\ ˈkərd-liŋ , ˈkər-dᵊl-iŋ \
Definition of curdle
refers to a food ingredient that separates because of overheating or because an acidic ingredient has been added such as lemon juice to a milk or egg preparation.