In a medium bowl mix flour, baking powder, nutmeg, and salt. Set aside.
With an electric mixer on high — cream butter, sugar and lemon zest in a large bowl until light and fluffy, about three minutes. Add egg, vanilla, and lemon juice—mix until just combined, a minute or two.
Reduce mixer to low; add the flour mixture in three batches, making sure each is just incorporated before moving to the next. Dough may be a bit sticky but soft and smooth too.
Divide dough in half, flatten to 1-inch disks, wrap and refrigerate for one hour or overnight.
Preheat oven to 375°F.
Using a lightly floured work surface, standard rolling pin, and one dough disk— roll to slightly above 1/4" thick. If embossing, lightly flour the pin, tap once against the counter, then apply medium pressure, and pass one time across. Re-flour and pass again through only un-embossed dough. Dip the cookie cutters in a light dusting of flour to prevent sticking, then cut shapes. If needed, re-flour along the way. Place the shapes on a cookie sheet fitted with parchemnt or a Silpat leaving about a 1/2 to 3/4 inch space between each cut shape.* I used a Silpat to make these cookies. Parchment or a light greased pan may need more or less baking time, so keep watch close to the finish time. Embossed cookies tend to catch lemon sugar within the grooves. For un-embossed cookies, lemon sugar is exceptional.
For softer cookies -Bake until the center is puffy, about 8-10 minutes. Remove BEFORE the edges begin to brown. For crisper cookies -The edges may begin to brown. Because ovens vary, it's important the cookies don't dry, crack, or over-bake. Bake about 10-13 minutes.
Remove and let stand a few minutes, then transfer to cool on a wire rack.
Quick and Dirty Chocolate Melting and Dipping
For one dough disk: melt a half bag of chocolate chips or 6 ounces uniform chopped chocolate For two dough disks: melt a full bag of chocolate chips in a microwave safe bowl. Start with 1 minute on high, then for 20 second bursts, stirring after each interval. Ready is when the chocolate is almost completely melted. Stir the rest of the way until melted and a lifted spoon streams chocolate.
Dip half the cookie in the chocolate, then (so the cookie lays flat once dry) scrape the bottom lightly against the edge of the bowl. Sprinkle with sanding/turbinado/raw sugar or sprinkles, then lay on a wire rack until set.
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Notes
All-purpose flour can be used in place of whole wheat flours.
If making smaller or larger cookies, adjust the bake time up or down according to the size.
Dough can be made up to two days in advance.
If dough's been refrigerated for over an hour, allow to sit on the counter for about 5-7 minutes before rolling.
Store cookies covered on the counter or in an airtight container for 4-5 days.
I've never frozen cookies but hear they can be sealed, then left out to defrost for about ten minutes before loved again.