- Preheat oven to 350°F. 
- Boil chicken breasts until fully cooked; shred once cooled. 
- In a large bowl, mix shredded chicken, soup, sour cream, and 2 tbsp poppy seeds. 
- Spread chicken mixture in a greased 9x13-inch baking dish. 
- Mix crushed Ritz crackers with melted butter and remaining poppy seeds. 
- Sprinkle cracker mixture evenly over chicken. 
- Bake for 35-40 minutes until golden and bubbly. 
- Let sit for 5 minutes before serving.