Only if the population of the USSR was around 6.4 million and all the food aid arrived in a single year. U.S. Army sources cite 1.5 million tons of food aid to the USSR for the entire L/L program, so your numbers are grossly exaggerated.
More relevant, the pipeline was filled by V-E Day, so Stalin would have had a few months of everything. Initiate a commie uprising in France, then make a thrust to Antwerp.
A little riskier due to the calendar, but by the end of August the US had redeployed 1.1 million GIs (just over one third of peak ETOUSA strength) and close to 400k more were in or on their way to embarkation camps and were turning in their equipment for packing or storage. If Stalin strikes in early September, he might just get to Antwerp by Christmas.
A Patton-inspired preemptive attack would have robbed Stalin of the initiative, but our redeployment plan kicked off three days after V-E Day with 1.1 million troops in organized units slated for the Pacific. Hard to turn that around on a dime. Patton lost the political argument, so he used the only tool available to him: bombast.