Chocolate chips vs chopped chocolate

Only where you want distinct pieces. Chips are engineered not to melt, which makes them wrong for anything the chocolate should disappear into.

Why these get confused

Chips look like chocolate in a convenient shape. They are a different formulation, with reduced cocoa butter and often added stabilisers, specifically so they hold their shape in an oven.

Side by side

 ChipsChopped barWhy it matters
Cocoa butterDeliberately reduced, often with stabilisers.Whatever the bar carries — generally more.This single difference drives everything below.
In a batterHolds shape, giving distinct pockets of chocolate.Melts into the mixture, giving depth throughout.For a brownie you almost always want the second. For a cookie you may well want the first.
In ganacheResists melting, giving a grainy emulsion that never comes together.Melts cleanly in hot cream.A grainy ganache made with chips reads as a technique failure and is a materials one.
For coating or mouldingSets badly and coats too thickly. No technique compensates.Better, though for coating you want couverture rather than an eating bar.
ConvenienceNo preparation, uniform, easy to measure.Requires chopping, and uneven chopping causes uneven melting.The convenience is real. It is simply not worth it wherever the chocolate is meant to melt.

Choose Chips when

Cookies, muffins and anything where you want visible, distinct pieces that survive the bake.

Choose Chopped bar when

Brownies, ganache, mousse, sauces and anything where the chocolate should become part of the mixture.

Related

Compared in

  • Chocolate chipsSet against Chopped bar, which readers frequently believe is the same thing.
  • Dark chocolateSet against Chips, which readers frequently believe is the same thing.

Sources

  • ChocolateHQ editorial synthesisChocolateHQ(citation identity confirmed; passage not re-read)