Electrodeposition is an efficient and widely used technology with applications ranging from functional, protective, and decorative coatings with precious metals, oxides, metal alloys, and polymers. Different morphologies, sizes, and thicknesses can be achieved by controlling or varying the potential/current [2]. The mechanism behind the formation of gold microstructures involves a sequence of nucleation, adsorption, growth, and branching [3]. In this work, two different morphologies were grown on a screen-printed carbon electrode (SPCE) by performing the electrolysis through constant applied potential and cyclic voltammetry. The experiments were carried out with a potentiostat/galvanostat Autolab PGSTAT128N, connected to a computer with NOVA 2.1 software. The electrolyte solution consisted of 0.1 M Na2SO4 and 30 mM HAuCl4. By applying a constant potential of 0.6 V for 600 s, dendritic microstructures were obtained with leaves shape. On the other hand, by applying twenty consecutive cycles by cyclic voltammetry, at 200 mV s-1, flowers-like microstructures were obtained. Figure 1 shows the images obtained by scanning electron microscopy (SEM), where the changes in morphologies can be observed. The effect of the modification was evaluated by cyclic voltammograms before and after electrodeposition using potassium hexacyanoferrate (III) as a probe molecule.