Mix the dry ingredients and crumble the butter into them.
Add cheddar, chili, jalapenos, and sour cream and combine the dough without kneading.
Press it flat with your hands to a height of about 1.5 cm.
Cut out using a small glass.
Place your scones on a baking sheet and brush with egg.
Bake at 175° convection for about 12-15 minutes.
The small scones are delightful on the tapas table with ham, sausage, or a salmon mousse, or on the brunch table with eggs, sausages, and cream cheese.