I have heard the vanilla cake at Chocolata's very good and they do a mean hash milkshake at Abraxas. Jon
I have had space cakes and space shake at coffeeshop Baba, unfortunately I have never had space Cate, but I bet she's a great shag anyway! http://www.coffeeshop.freeuk.com/Database/ShopsA/Baba.html
best place in the city for space brownies is Baba right at the entrance to the RDL, I believe on Warmoestraat. They're homemade, huge and not those peculiar manufactured looking ones in the plastic you'll find at some of the more "commercial" coffeeshops. They also pack a powerful punch. Back in November of 03, I was in AMS for about two weeks and near the end of my stay I ate a full brownie from Baba and it knocked me out for the night..
YES! Skinner knows his shit... a nice fat, 4EU brownie from BABA is incredible... very chocolatey, and has the power to make the earth stop spinning about thirty minutes after consumption ;-) a whole GRAM of hash in each brownie!!! yumyumyumyummmmmm
for space cakes i reccomend Homegrown Fantasy. For other space products try Popeye, be sure to try some one of his Happy Breakfasts, a full english breakfast laced with a choice of White Widdow or Snow White. Be sure to buy some nepal cream in there, he only buys it in if its is really good gear.