Gather all ingredients. Preheat the oven to 350°F (175°C).

Fill a large pot with water and bring to a simmer over medium heat. Add chicken; poach in simmering water until no longer pink in center, about 12 minutes. Use a slotted spoon to remove chicken from pot and set aside. Leave water in the pot.

Bring chicken cooking water to a boil. Stir in egg noodles and cook until tender with a slight bite, about 10 minutes. Drain.

Transfer noodles to a large bowl. Cut chicken into bite-size pieces and mix with noodles.

Mix together both condensed soups and sour cream in a separate bowl. Season with salt and pepper. Add soup mixture to chicken mixture and gently stir until combined. Transfer to a 2-quart baking dish.

Melt butter in a small saucepan over low heat and remove from heat. Stir in crumbled crackers.

Sprinkle cracker mixture over top of casserole.