Can I make this without a stand mixer?
Absolutely. This recipe is built for a bowl and a whisk. Once the flour goes in, switch to a spatula and fold just until you stop seeing dry streaks.
What pan size is best?
An 8 inch round pan gives the thickest, chewiest center. A 9 inch works too and bakes a bit faster. If you use a 10 inch pan, expect a thinner cookie cake and start checking early, around 16 to 20 minutes.
Any notes on pan material?
Dark metal pans brown faster and can crisp the edges more, so start checking a couple minutes early. Light metal bakes more gently and evenly. Glass tends to bake slower and can over-brown the edges by the time the center is right.
How do I know it is done if the center still looks soft?
That is the goal. Pull it when the edges are set and golden, the top looks mostly dry, and the center is just slightly underdone. It will finish setting as it cools. If you like numbers, the center will often read about 175 to 185°F on an instant-read thermometer.
Can I reduce the sugar?
You can usually cut total sugar by about 10% without major issues, but it can change browning and chew. If you want it less sweet, another move is keeping the sugar and using bittersweet chocolate or chopped dark chocolate.
Can I add nuts?
Yes. Add 1/2 cup toasted chopped pecans or walnuts. You can add them in addition to the chips, but if you want to keep the mix-ins from getting too crowded, swap out about 1/4 cup of the chocolate chips for nuts.
Why espresso powder?
It does not make the cookie cake taste like coffee. It makes the chocolate taste more intense. If you do not have it, skip it.
Can I make the spices milder?
Yep. For a softer spice profile, use 1/2 teaspoon cinnamon and skip the ginger. Keep the cardamom if you want that bakery aroma, or drop it if you want classic chocolate chip vibes.