Puzzle 025: Which bread?

ナゾ０２５　どのパン？
４種類で合わせて１２個のパンがあり、
同じ種類のパンは同じ形をしている。
クリームパンはバターパンよりも多く、
チョコレートパンはジャムパンより
少なく、ジャムパンはクリームパンより
少ない。
どの形がどの中身のパンかを知るため
には、最少で何個のパンを食べれば
よいだろうか？

Google Translate
12 There are four types of bread in each pan of the same type have the same shape. Cream butter than bread bread bread bread less chocolate jam, pan jam pan is less cream. To know which type of bread which is inside, what should I eat the bread of many pieces in the least?

Notes on Puzzle
You are given a picture of a table with a variety of bread. There are some flower shaped bread, some simple round rolls, some cat-shaped bread, and some square-shaped bread. Each shape of bread is a certain flavor, but you don't know which is which. Your clues are:
- More cream bread than butter bread
- Less chocolate bread than jam bread
- Same amount of jam and cream bread
What is the minimal number of bread you need to taste in order to figure out which shape of bread is which flavor?