Is chocolate in cookie dough a mixture or solution?

* Mixture: A combination of two or more substances where each substance retains its own properties. You can still see and separate the individual chocolate chips from the dough.

* Solution: A homogeneous mixture where one substance (solute) dissolves completely into another (solvent). You can't see the individual components of a solution.

In cookie dough, the chocolate chips remain separate and distinct from the dough, making it a heterogeneous mixture.