What product will be produced when a sucrose and potassium nitrate mix burns?
You will get potassium carbonate ($\ce{K2CO3}$), carbon dioxide ($\ce{CO2}$), water ($\ce{H2O}$), and nitrogen gas ($\ce{N2}$):
$$\ce{48KNO3 + 5C12H22O11 -&gt; 24K2CO3 + 36CO2 + 55H2O + 24N2}$$

See this yahoo question and this science forums thread.