01 -
Heat the oven to 350°F.
02 -
Grease a 13 × 9-inch baking pan.
03 -
Combine the butter and sugar in the bowl of a stand mixer fitted with the paddle attachment and cream on high until homogenous, about 3 minutes.
04 -
Add the eggs, oil, and vanilla and mix until just combined, about 1 minute.
05 -
Add the flour, salt, and baking soda, mixing until just combined, about 30 seconds.
06 -
Mix in the milk until just combined, about 30 seconds.
07 -
Spread the dough in an even layer in the prepared pan.
08 -
Mix together the sugar and cinnamon in a small bowl and sprinkle evenly over the cookie dough OR just cover with colored sugar or sprinkles.
09 -
Bake 20 to 25 minutes for a slightly under baked cookie (which is how I like it), or another 3 to 5 minutes if you're a firm cookie fan. Cool completely in the pan before cutting into squares.