An egg boiler device for a refrigerator appliance is provided. In one aspect, a refrigerator appliance has a refrigerator door that defines a dispenser recess. The egg boiler device includes an end cap and a canister for receiving one or more eggs for cooking. The egg boiler device is positioned within the dispenser recess and the end cap is mounted to a dispenser assembly. A dispenser of the dispenser assembly directs a volume of heated water into the egg boiler device. The heated water imparts thermal energy to the eggs, and consequently, the eggs are cooked.