Add a large pot of unsalted water to stovetop and heat on high to bring to a boil.
Meanwhile, in a medium to large sized bowl, add peanut butter, honey, soy, peanut oil, rice vinegar, lime juice, chili garlic sauce, ground ginger, and garlic powder. MIx well into a creamy thick sauce.
Once the sauce is made and water is boiling, add the soba noodles and let boil for 3 1/2 minutes.
Drain noodles, give just one shake in the colander and then immediately add them to the sauce - a little bit of the cooking liquid will help loosen the sauce a bit and help coat the noodles with the sauce.
Mix well with tongs ensuring that all of the noodles are coated in the peanut sauce.
Top with peanuts, green onions, and cilantro. Add sriracha if desired. Serve hot or cold.