Preheat the oven to 400 degrees F
Ingredients: 4 cups plus 1 TBS all-purpose flour, divided; 2 TBS baking powder; 2 tsp salt; 3/4 pound cold unsalted butter, diced; 4 extra large eggs, beaten lightly; 1 cup cold heavy cream;1/2 lb extra-sharp yellow cheddar, small diced; 1 cup minced fresh dill; 1 egg beaten with 1 TBS water or milk, for egg wash.
Combine 4 cups of flour, the baking powder, and salt in the bowl of an electric mixer, filled with a paddle attachment. Add the butter and mix on low speed until the butter is in pea-sized pieces. Mix the eggs and heavy cream and quickly add them to the flour and butter mixture. Combine until just blended. Toss together the Cheddar, dill and 1 TBS of flour and add them to the dough. Mix until they are almost incorporated.
Dump the dough onto a well-floured surface and knead it for 1 minute, until the Cheddar and dill are well-distributed. Roll the dough 3/4 inch thick. Cut into 4 inch squares and then in half diagonally to make triangles. Brush the tops with egg wash. Bake on a baking sheet lined with parchment paper, for 10 to 25 minutes, until the outside is crusty and the inside is fully baked. (The Food Network, 2006)