1.   Blend again until mixture starts to hold together.

2.   Add cream or milk and stir continuously until mixture starts to thicken.

3.   Add flour and pulse until mixture just starts to come together.

4.   Cook, stirring, until mixture starts to sizzle, a minute or two.

5.   Cook, stirring, until the mixture starts to thicken.

6.   Cook over medium heat until mixture starts to boil.

7.   Cook over medium heat, stirring constantly, until the mixture starts to boil.

8.   If mixture starts to harden, return to low heat and whisk until dissolved.

9.   If mixture starts to separate, whisk again before serving.

10.   Return to heat briefly, until mixture starts to film pan.