In the framework of the energy shift toward Renewable Energy Sources , ammonia is considered a valuable energy vector, due to its very high hydrogen-density and well-established production processes. Despite the many potential advantages, its combustion features (narrow flammability limits, high auto-ignition temperature, potential high fuel-NO x emissions) may hinder its wide utilization. To overcome these issues in conventional combustion, “fuel enhancers” are also used. Differently from conventional systems, MILD Combustion already proved to be very effective in oxidizing ammonia in terms of stability and NO x emission. Nevertheless, a “fuel enhancer” can be also useful in MILD Combustion conditions to further improve the process characteristics. The present study focuses on the ammonia/methane combustion characteristics under MILD Combustion conditions in a lab-scale burner. Gaseous pollutant emissions (NO x , NH 3 , H 2 , CO) and process stability limits were analysed as a function of the equivalence ratio and NH 3 /CH 4 fuel composition. Results showed that the use of NH 3 /CH 4 blends extends the stable operational range of the system, in terms of both working temperatures and equivalence ratios, with respect to pure NH 3 . On the other hand, blends produce higher NO x emissions, with respect to both the pure NH 3 and CH 4 cases. Experimental data were compared with chemical kinetics modelling results. Chemical pathways and rate of production of main intermediate products highlighted that oxidation pathways of carbon and nitrogen-based species are essentially decoupled as experiments suggested. In contrast, the interplay of the methane and ammonia main chemical pathways affects the DeNO x channel in correspondence of the observed NO x emission increase.