I would like to program an intelligent Vlookup as follows.

I have a set of data spread over 2 columns. Let us say column A is type of
Food and column B is actual food-item.

for example, here is a short list
Column A Column B
Vegetable Potatoes
Fruit Orange
Fruit Banana
Vegetable Brocolli
Bakery Bread
Bakery Croissants
Vegetable Spinach
Fruit Grapes

I would like to program 2 drop-down lists with following requirements
The first list has as valid values all the FOOD types (thus Fruit,
Vegetable, Bakery).
The second list has as valid values all the items that are valid for the
selected item in first list. Thus if I select Bakery in drop-down list 1
then in list 2 I should see only Bread and Croissants as choices.

Any tips on how to achieve this? FYI: I can sort the data in any order if
that can facilitate the vlookup (or any other useful function).