by Matt Slick
Biblically speaking, the answer is simple. The chicken came first. God made things in a state of maturity. He made Adam as a full grown man (Gen. 1:26-31; 2:7-8), not as an infant. We can then conclude that God's manner of creation was to create chickens in maturity, who then laid eggs.
However, an evolutionist might say that neither came first. He’d infer that a globule of slime, and/or chemicals, and/or atoms, gradually formed into life that somehow emerged from the innate chemical properties of complex molecules -- which then gave rise to even more super-complex information structures in DNA, which eventually led to reptiles, then egg laying birds. This would mean that chickens and eggs evolved simultaneously.
But Biblically speaking, the chicken came first.