Dark chocolate has a higher concentration of theobromine than any other food found on earth. It is a drug in the form of a superfood, whose flavor and aroma complexity surpasses that of wine. Here is a recipe for the nutritional life-hack that has gotten me through the last ten years.
Dark chocolate contains more cocoa solid (plus usually less sugar and more antioxidants), so its the ideal way to consume theobromine. In case youre wondering, cocoa butter only contains trace amounts of caffeine and theobromine.

The different chemical compounds present in dark chocolate stimulate cognitive function and also positively modulate mood swings (Lippi et al., 2009). Dark chocolate positively influences the nerve growth factor and theobromine levels in plasma (Sumiyoshi et al., 2019).

Furthermore, visual representations like the one above help us fully grasp the concept of Spanish Dark Chocolate Theobromine Percentages.
How Much Theobromine Is In Milk Chocolate? Milk chocolate generally contains less theobromine than dark chocolate due to its lower cocoa content. On average, milk chocolate contains about 60-70 milligrams of theobromine per 30 grams (roughly an ounce) of chocolate.

And it notes that theobromine is more concentrated in dark chocolates making them more dangerous than milk or "white" chocolate. The dark chocolate effects are so acute for canines, that the alkaloid has been tested with some success as a means of controlling coyote populations.