Place 2cm³ of the sample into a test tube 

Add 2 drops of Iodine Solution and shake 

And if the soultion turns blue-black the starch is present

As a control repeat the test but use water instead of the sample

Put the food sample in a test tube 

Add the same amount of Benedict's reagent

And heat it up by using a water bath - if  non reducing sugar is not present (still a blue colour)

Then another 2cm of the food sample to 2cm of (dilute) hydrochloric acid in a test tube

 Add sodium hydrogencarbonate to the test tube to neutralise the acid 

Now re-test the solution by heating it with the 2cm3 of Benedict's reagent for 5 mins,

 the solution turn orange-brown/brick red because reducing sugars are present