Cream butter, peanut butter, and both sugars in the bowl of an electric mixer fitted with the paddle attachment, about 1 minute. Add egg, vanilla, milk, baking soda, and salt and mix until combined. Slowly add flour and mix until dough just comes together, scraping the sides of the bowl as necessary. Stir in 1 cup chocolate chips and nuts.: The bowl will smell sweet and nutty as the unsalted butter , peanut butter , and sugars emulsify, producing a pale, slightly fluffy mixture. I like to scrape the sides once or twice so everything mixes evenly, and you should see the granulated sugar begin to dissolve into the butter. This step matters because it incorporates air into the dough, helping with texture. A common mistake is creaming for too long which can make the mixture overly soft; stop once it looks even and slightly lightened in color. Listen for a low, even sound from the mixer, not a high pitch which indicates overbeating.
Line a 9” round cake pan with foil and spray with cooking spray. Press dough into pan.: Right after adding the egg , vanilla , a splash of milk , baking soda , and salt , the mixture will become glossy and slightly looser. I gently fold these in rather than whip them hard to avoid toughening the dough. This step ensures the leavening is evenly distributed, which affects rise and crumb. A common error is adding these when the butter is too warm, which can curdle the mix; if you see separation, chill briefly and then continue. You should smell the vanilla bloom as the ingredients mingle.
Preheat oven to 350°F. Bake for about 18-22 minutes, until the top is golden brown. Let cool completely before continuing.: As you sprinkle in the flour , the dough transitions from glossy to a cohesive mass that pulls away from the bowl. I stop mixing when I no longer see large streaks of dry flour, so the dough stays tender instead of overworked. Overmixing activates gluten and can make the cake dense, so stop when everything is combined and a paddle leaves definite swirls. The dough should feel soft and slightly tacky to the touch.
To make the football: make two cuts in the cookie cake, 1” apart right on each side of the center. (It’s like you’re cutting it in half but you’re making two long cuts just off center.) Remove the 1” cookie piece.: When you fold in the chocolate chips and optional chopped peanuts , the dough gains little pockets of color and texture. I do this by hand with a spatula to preserve the chip shapes and to evenly distribute the nuts. This step matters for bite contrast and visual appeal. Avoid smashing the chips into tiny bits by overworking; you want whole bits that melt while baking. The aroma of peanut and chocolate will become more pronounced here.
Melt remaining 1 cup of chocolate chips with oil or shortening in the microwave on high in 30 second increments, stirring between each. (The oil is to help keep the chocolate from seizing.): Pressing the dough into the lined pan, you should feel it compact and spread to the edges with gentle pressure. The surface will be slightly dimpled from your fingers, which is fine because it smooths during baking. This pressing creates a uniform thickness important for even bake. Common mistakes include leaving thin spots which can burn, so check for even thickness across the pan. The dough should hold its shape and not slump in the center when you move it to the oven.
Use a knife or offset spatula to spread some melted chocolate inside the cut halves of the cookie, then press them together to seal. Once the chocolate hardens, the cookie will stick together. You now have a football shaped cookie cake!: During baking you will notice the kitchen filling with an irresistible nutty, buttery scent and the edges turning golden. The center should look set, not jiggly, and the top should be lightly golden, signaling readiness. Let it cool completely so the structure firms and the melted chips reset, which prevents breakage when cutting the football shape. A common problem is removing it too hot, which can cause crumbling; patience here pays off. You can test the center by a gentle press, it should bounce back slightly.
Pour the remaining chocolate over the top and spread evenly. Chill to set the chocolate, then pipe on the laces using white frosting or melted white chocolate.: make two cuts in the cookie cake, 1” apart right on each side of the center. (It’s like you’re cutting it in half but you’re making two long cuts just off center.) Remove the 1” cookie piece : The small removed strip creates the indentation that becomes the football seam, and the remaining halves will form the rounded ends. Work on a flat surface and use a steady, even hand with a long knife to make clean cuts. This shaping matters for the final look and how well the two halves align. A typical mistake is cutting too widely, which changes proportions; measure carefully and keep the cuts straight. You may feel a slight resistant crunch if the cookie edges are firmer, that is normal.
Melt remaining 1 cup of chocolate chips with oil or shortening in the microwave on high in 30 second increments, stirring between each: As you heat, the chips will soften and become glossy, and stirring will encourage a smooth emulsion with the vegetable oil or shortening . The scent becomes rich and chocolatey, and you will see the mixture go from grainy to fluid. This step keeps the chocolate from seizing and ensures it coats smoothly. Avoid overheating which causes burning or graininess; stop microwaving when most chips are melted and stir until smooth. If you see lumps that do not melt with stirring, the chocolate may have seized.
Use a knife or offset spatula to spread some melted chocolate inside the cut halves of the cookie, then press them together to seal. Once the chocolate hardens, the cookie will stick together. You now have a football shaped cookie cake: The melted chocolate acts as an edible adhesive, and when you press the halves together the seam will look neat and uniform once set. Apply a thin, even layer so the halves meet without sliding. This technique matters because it stabilizes the shape for pouring chocolate on top. A common issue is using too little chocolate which can lead to the halves separating; use enough to form a secure seal but not so much that it oozes out excessively.
Pour the remaining chocolate over the top and spread evenly. Chill to set the chocolate, then pipe on the laces using white frosting or melted white chocolate: Pouring the glossy chocolate creates a smooth, shiny shell over the cookie cake, and chilling it quickens setting so the surface becomes firm. When piping the laces, use a steady hand and a slightly thick frosting for crisp lines that hold. This finishing touch turns the cake into a recognizable football, and the contrast of white on dark chocolate is visually striking. A typical mistake is trying to pipe on a warm surface; ensure the top is set so the laces keep shape. The final product should look polished and slice cleanly once the chocolate is cold.