Hi Hema, did you brush the butter on top before putting them in the oven? The butter gives it that beautiful color. The hardness could be cos of overbaking..The oven model varies from one to another and hence temp setting of one will give a different result compared to another. So next time you are baking (until u know what temp works for your model) always check your goods halfway of baking. Suppose if it says bake something at 350F for 15-20min, start chking when its like 8 min mark ….You probably might find that yours gets done faster than the prescribed time…Hope this helps –DK