Big as a platter and suitable for a birthday! Drizzle with icing and light the candles!
For optimal texture, ensure butter and cream cheese are at true room temperature before creaming; this creates an exceptionally smooth, uniform base. Avoid overmixing the flour once added, as this can develop gluten excessively, leading to a tougher cookie. Toasting the walnuts lightly before adding them intensifies their nutty flavor. For presentation, once cooled, consider a simple glaze of powdered sugar and milk for a celebratory touch, especially if adding candles. Monitor baking closely; these large cookies benefit from even heat, so rotating the pans halfway through is advisable to prevent uneven browning. The centers should set but remain slightly soft for that perfect 'humungous' chew.