Preheat oven to 350 degrees Fahrenheit. Using a baking spray that contains flour, spray mini muffin tins (large enough to fit about two dozen mini muffins) to grease well.

In a large, microwave-safe bowl, combine oil, sugar, cocoa powder, and salt. Microwave 30 to 45 seconds, or until mixture is warm/hot. Stir until smooth.

Mix in vanilla extract and then the eggs, one at a time.

Stir in the flour gently. Mix in chocolate chips last.

Roll dough into medium-large balls. Press into the prepared tins, flattening tops.

Bake about 11 to 13 minutes, or until a toothpick inserted into the center of a brownie cup comes out with gooey crumbs. Toothpick should NOT be clean.

Let brownies cool and harden before running a knife along the edges to ease them out of the pans.

Top with a simple chocolate glaze, if desired.