Peanut Butter Thumbprints

Steps

• Dough: Cream the butter, peanut butter, and both sugars until light, about 3 minutes.
• Dough: Beat in the egg and vanilla.
• Dough: Whisk the flour, baking soda, and salt together and mix in just until combined.
• Chill: Chill 45 minutes.
  ⏱ Start 45 min timer
• Shape: Roll into walnut-sized balls, space on a lined sheet, and press a deep well into each with the round end of a wooden spoon.
• Bake: Bake at 175°C (350°F) for 7 minutes, until set but still pale.
  ⏱ Start 7 min timer
• Bake: Take the sheet out, re-press each well firmly, spoon in about half a teaspoon of jam, and return to the oven until the edges are golden.
  ⏱ Start 7 min timer
• Cool: Cool on the pan 10 minutes — the jam is molten.
  ⏱ Start 10 min timer