Depends on the species! Strawberry frogs taste like strawberry, frogs like me taste like blueberry, and so on!
On an off-topic note... I've been revisiting an old Monica-themed tumblr with out of context pictures from the comic books, which turns out giving them double meanings or showing how weird the stories can be. Here's a sample image:
[1st panel]
Magali: PTOOEY!! What a horrible smell!! What is this pastel (typical Brazilian savory snack) you gave me filled with?! Sewage?!
[2nd panel]
Cebolinha/Cebollita/Jimmy Five: Yes! Mine is fiwwed with fwied beetles and cweam cheese!
Monica: And mine is filled with nose goop!
Magali: Yuck!! Are you going nuts?!
[3rd panel]
Cebolinha/Cebollita/Jimmy Five: No!
Monica: But you are!
Frog: BLEH!! I'm the frog genie of the sewage pastel!!
Magali: WHAT?!
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So whether I'm inherently random or the media I consumed made me random, your guess is as good as mine xP