The next time you stroll through the refrigerated aisles of Costco, you'll notice a recently launched contender among the ...

This is true in many minds for the Kirkland Signature Grass-Fed Butter, which is a dupe for Kerrygold Pure Irish Butter. The biggest difference, though? They're imported from different countries.

a costco hot dog with ketchup and mustard on an outstretched hand - leewrachel/Shutterstock Costco is known for its many Kirkland Signature house brand items, like its grass-fed butter from New ...