Remove the pan from the heat and add the flour all a once. Vigorously stir the batter until the flour is absorbed and there are no lumps.
5 ounces bread flour
Return the pan to medium low heat and continue stirring for 3 minutes. The batter will come together and form a smooth, cohesive ball.
Remove the pan from the heat and transfer the batter to a food processor fitted with a blade (if mixing by hand transfer to a mixing bowl). With the processor running, add eggs and whites in a steady stream. Mix until the batter comes together. (If mixing by hand add the eggs in three batches. After each addition, stir vigorously until the batter comes together.)
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Notes
1. If measuring the flour by volume use the “dip & sweep” method. That is, dip the measuring cup into the flour bin, overfill it, then sweep away the excess.2. Save the extra yolks to make pastry cream filling.3. The baked cream puffs or eclairs freeze very well. Pack them into freezer bags (don't overcrowd or crush) and freeze for up to a month. To use, line the frozen puffs on a sheet pan and heat in a 350°F oven for 5 minutes. Cool and fill.