With mechanical properties similar to that of living tissue, soft electronics can serve a central role in the development of biosensors, wearable devices, and implantable devices. 3D printing offers a powerful way to fabricate the customized geometries that will be necessary for such applications and provides opportunities for rapid iteration and modification. Because different applications may call for various hydrogel properties, we demonstrate the ability to tune ink viscosity, hydrogel stiffness, and hydrogel conductivity. The demonstrated functional hydrogels are based on acrylamide, due its stability and ubiquity, and PEDOT:PSS, a commonly used conductive organic polymer. The mixed ionic-electronic conductivity of PEDOT:PSS makes it an ideal candidate for interfacing electronics with biological cells and tissue, like neurons or muscle. Using a variety of characterization methods, we highlight the advantages of designing conductive hydrogels in this way. Ultimately, we demonstrate the ability to use extrusion 3D printing to fabricate components suitable for soft electronics. In future steps, we will focus developing micro-scale fabrication techniques for conductive hydrogels.