Suppose you have some cookie value encoded using BASE64. Encoding: bmFtZT0lMjNzc29tZUNha2Umc2l6ZT0lMjNzYmlnJnRvcHBpbmc9JTIzc3N1Z2Fy. Use the BASE64 decoder and find the value of the topping variable.
Note that you should not add %23s to your answer, because it is used only for formatting.