Globally, the use of H 2 O 2 for the preservation of raw milk has a long established history. However, in the EU, US and most parts of the world, where access to refrigeration facilities is widely available, the adulteration of milk with H 2 O 2 is generally not permitted. An inhouse hand-printed carbon electrode consisting of graphite printing ink modified with the room temperature ionic liquid (RTIL), 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF 4 ]), ferrocene carboxylic acid (Fca) and cellulose acetate (CA) for the electrochemical sensing of hydrogen peroxide (H 2 O 2) in commercially packaged aseptic milk is described. The developed electrode successfully enabled sensitive determination of H 2 O 2 , free from interference from some known electroactive species such as ascorbic acid (AA), dopamine (DA), glucose and uric acid (UA). The linear range for the determination of H 2 O 2 was 1.0 μM-1.2 mM with a limit of detection of 0.35 μM and a sensitivity of 10.6 nAμA-1 μM-1 cm-2. When used for the analysis of H 2 O 2 residues in milk samples, the resulting precision (n = 6) and recovery were 0.53 % and 97.8 %, respectively.