If the Noodles are made with Matzo Meal

Brocho before eating this: Borei Minei Mezonos

Brocho after eating the proper shiur of this: Al Hamichya

If the Noodles are made without Matzo Meal

Brocho before eating this: Shehakol Niyeh Bedvoro

Brocho after eating the proper shiur of this: Borei Nefashos

Source: The Laws of B'rachos (page 376)