I’m gonna make some gift baskets for birthday and Easter for the same weekend (april 12th), it will be around 4 baskets with decorated cookies, cupcakes, brownies and candies and I don’t want to make everything on Friday in order to rush with everything. Also I have another job during the day. So, how long could make all of this before without them losing taste or consistence? Can I make them 1 week before?

yes you can make them a week ahead , freeze them do not frost them until the night before they will stay fresh but may shrink a little but its normal . they will bounce right back after you thaw them.