Preheat the oven to 350°F. Prepare the four mini loaf pans by pressing a small sheet of parchment into each so that the inside walls and bottom are all covered. Set aside on a baking sheet for later.
Combine the chopped dates with a couple spoonfulls of the measured flour. Toss them to coat, and make sure the bits of date aren’t stuck together. Set them aside.
Whisk the baking powder, salt, and freshly ground pepper into the rest of the flour. Set the dry ingredients aside.
In a medium bowl, whisk together the eggs and the milk until they are combined and a little frothy. Add the dry ingredients and whisk to combine.
Slowly drizzle the grapeseed oil into the batter while whisking constantly.
Switch to a wooden spoon and stir in the chopped chorizo and the prepared floured-dates (plus any flour at the bottom of the bowl).
Divide the batter evenly among the prepared loaf pans.
Bake them until the tops begin to turn golden and the loaves are set. This takes about 50 minutes because they pans are very full (but check them every 10 minutes as of the 30 minute mark to be sure). Let them cool completely before serving.
Notes
This recipe can be made in 4 mini loaf pans or one regular loaf pan (8.5" x 4.5").