Chess Opening Theory/1. e4/1...e5/2. Nf3/2...d6/3. d4/3...Nd7/4. Bc4/4...Be7/5. dxe5/5...Nxe5/6. Nxe5/6...dxe5

6...dxe5
This is the obvious recapture. The only move to gain an advantage for white is 7.Qh5.