Originally Posted by iiddnn
76:13 Reclining in the (Garden) on raised thrones, they will see there neither the sun's (excessive heat) nor (the moon's) excessive cold.
So there is no winter or summer in Paradise. Also, there is no night, because there is only the bright day and the evening, the evening turns back into daytime again.
19:61 Gardens of Eternity, those which (Allah) Most Gracious has promised to His servants in the Unseen: for His promise must (necessarily) come to pass.
19:62 They will not there hear any vain discourse, but only salutations of Peace: And they will have therein their sustenance, morning and evening.
And yes, you can have all the oreos you want in Paradise, if Allah willing, you reach it:
25:16 "For them there will be therein all that they wish for: they will dwell (there) for aye: A promise to be prayed for from thy Lord."
I hope these answered your questions. The Qur'an is the best source of guidance.