As food lovers in the U.S. prepare to celebrate National Pizza Day on Feb. 9, EU consumers will have to search deeper in their pockets to enjoy a slice of Italy's most renowned fast food.

However, the pizza inflation rate varied wildly across the EU, with Hungary topping the Eurostat chart with a 46% yearly price increase, followed by Lithuania and Bulgaria on 39% and 37% respectively.

The smallest price hikes in pizza and quiche, lumped together in Eurostat's novel indicator, were recorded in Luxembourg (+7%), Italy (+10%) and France (+13%).

Overall inflation in the euro zone increased in December by +9.2% year-on-year, with a 13.8% hike in food, alcohol & tobacco products, the agency reported last month.

Eurostat categorizes "pizza and quiche products" as including store-bought varieties of "flour based products prepared with meat, fish, seafood, cheese, vegetables or fruit".

(Reporting by Alessandro Parodi, editing by Gavin Jones)