The darker paper will absorb more heat and cause the bottom to be browner or possibly burn. I use regular typing or copy paper all the time. It tends to stick to the baked product more than parchment paper, but it pulls off with no problem.
As flat as paper, if you want
she invented the machine that makes flat-bottomed brown paper bage. (They were homemade and really expensive back then.)
Cartographers an represent the spherical Earth on flat paper by making a projection, which is like casting shadows from the spherical world onto a flat piece of paper.
Because baking powder has a rising ability
Yes it will
Crumpled.
You could make one out of paper mache. In which case, the paper would be a flat object.
Baking soda reacts with any acid in the other ingredients to make cookies rise.
Projection
Captain Brown is a flat character because he does not change throughout the course of the story.
bums
A bakestone is another name for a baking stone, a flat cooking surface, typically made of stone or ceramic, used in an oven for baking.