Curry In the American Kitchen:

Did you know that curry powder is actually a blend of spices and not one single ingredient? The single most common question people inquire about is if our food has “curry” in it? That’s a difficult question to answer considering it is not just one item. There are people who absolutely love the “curry” taste and others who don’t want to try the food because of these spices. The good news is that you can tailor the blend of the spices used in Indian cooking according to your taste palette.
Punjab Sweets packages our very own blend of hand roasted spices that we sell. The mixture of these spices generally includes garam masala, fenugreek, red chili powder, salt, turmeric, and cumin. However, many people personalize this blend to include what spices they like including cinnamon, cloves, caramom, and other aromatic Indian spices. The key is to experiment with how spicy, salty, tangy you prefer your Indian food to be. In fact this blend of spices is great to use on any types of food such as eggs, pizzas, pastas, soups, sandwiches, salads, potatoes, etc. Actually, these spices add flavor to just about any dish you can cook up in the kitchen and adds so much zest and heartiness. Yummy!!!

Interesting note from Wilkipedia: Curry powder is a mixture of spices of widely varying composition based on South Asian cuisine. Curry powder, and the contemporary English use of the word curry are Western inventions and do not reflect any specific Indian food.